Can I get AstraZeneca now and Pfizer later? Why mixing and matching COVID vaccines could help solve many rollout problems


Attila Balazs/EPA/AAP

Fiona Russell, The University of Melbourne and John Hart, Murdoch Children’s Research InstituteIn the face of changing eligibility for the AstraZeneca vaccine, new variants of the coronavirus and supply constraints, many people are wondering whether they can “mix and match” COVID-19 vaccines.

This means, for example, having the AstraZeneca vaccine as the first dose, followed by a different vaccine such as Pfizer as the second dose, and boosters with other vaccines later on.

While many studies are ongoing, data has recently been released from mix and match trials in Spain and the United Kingdom.

This data is very promising, and suggests mix and match schedules may give higher antibody levels than two doses of a single vaccine.

While Australia’s drug regulator, the Therapeutic Goods Administration (TGA), hasn’t yet approved a mix and match COVID-19 vaccination schedule, some countries are already doing this.

So how does this work, and why might it be a good idea?

What’s the benefit of mixing and matching?

If the COVID-19 vaccine rollout can mix and match vaccines, this will greatly increase flexibility.

Having a flexible immunisation program allows us to be nimble in the face of global supply constraints. If there’s a shortage of one vaccine, instead of halting the entire program to wait for supply, the program can continue with a different vaccine, regardless of which one has been given as a first dose.

If one vaccine is less effective than another against a certain variant, mix and match schedules could ensure people who’ve already received one dose of a vaccine with lower effectiveness could get a booster with a vaccine that’s more effective against the variant.

Some countries are already using mix and match vaccine schedules following changing recommendations regarding the AstraZeneca vaccine because of a very rare side effect of a blood clotting/bleeding condition.




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Several countries in Europe are now advising younger people previously given this vaccine as a first dose should receive an alternative vaccine as their second dose, most commonly mRNA vaccines such as Pfizer’s.

Germany, France, Sweden, Norway and Denmark are among those advising mixed vaccination schedules due to this reason.

Is it safe?

In a UK mix and match study published in the Lancet in May, 830 adults over 50 were randomised to get either the Pfizer or AstraZeneca vaccines first, then the other vaccine later.

It found people who received mixed doses were more likely to develop mild to moderate symptoms from the second dose of the vaccine including chills, fatigue, fever, headache, joint pain, malaise, muscle ache and pain at the injection site, compared to those on the standard non-mixed schedule.

However, these reactions were short-lived and there were no other safety concerns. The researchers have now adapted this study to see whether early and regular use of paracetamol reduces the frequency of these reactions.

Another similar study (not-peer reviewed) in Spain found most side effects were mild or moderate and short-lived (two to three days), and were similar to the side effects from getting two doses of the same vaccine.

Is it effective?

The Spanish study found people had a vastly higher antibody response 14 days after receiving the Pfizer booster, following an initial dose of AstraZeneca.

These antibodies were able to recognise and inactivate the coronavirus in lab tests.

This response to the Pfizer boost seems to be stronger than the response after receiving two doses of the AstraZeneca vaccine, according to earlier trial data. The immune response of getting Pfizer followed by AstraZeneca isn’t known yet, but the UK will have results available soon.

There’s no data yet on how effective mix and match schedules are in preventing COVID-19. But they’re likely to work well as the immune response is similar, or even better, compared with studies using the same vaccine as the first and second dose. This indicates they will work well in preventing disease.

Might this be one way to help resolve Australia’s slow rollout?

In Australia, we’ve seen many people wanting to “wait for Pfizer” and not have the AstraZeneca vaccine. This is despite the UK’s recent real-world findings that, following two doses, both vaccines are similarly effective against the variants circulating in the UK.

Delays in vaccine uptake have also been due to concerns regarding the very rare but serious blood clotting/bleeding syndrome after the first dose of AstraZeneca, as well as changing age restrictions in terms of who can receive this vaccine.

This caused widespread uncertainty and meant some younger people in some countries in Europe who had already received a first dose were excluded from getting a second dose.

The results from these mix and match studies support the possibility of vaccinating people who have received the first dose from AstraZeneca, with a different booster, if the need arises.

Further studies are underway to evaluate mix and match schedules with Moderna and Novavax vaccines, both of which Australia has supply deals with.

Don’t delay getting vaccinated

As Victoria tackles its current outbreak, many other countries in our region are experiencing a surge in cases too. These include Fiji, Taiwan and Singapore, countries previously hailed as excellent examples of how to manage COVID-19.

These examples highlight the difficulty of sustained suppression in the absence of high vaccination coverage. This will be further exacerbated by the new, more transmissible variants.

The current cases in Victoria are caused by the B.1.617.1 (“Indian”) variant. Both vaccines are effective against the closely related B.1.617.2 variant (albeit a bit lower than against B.1.1.7) and we would expect similar effectiveness against B.1.617.1.




Read more:
COVID is surging in unvaccinated Taiwan. Australia should take heed


It’s not clear what kind of evidence regulatory authorities, like Australia’s TGA, would require for a mixed schedule to be approved for use.

While we are waiting, it’s critical eligible people don’t delay getting vaccinated with the vaccine that’s offered to them now. Vaccination is an essential part of the pandemic exit strategy.

It’s likely the vaccination schedule will be modified in the future as boosters may be needed. This is normal for vaccination programs — we already do this each year with the influenza vaccine. This shouldn’t be seen as a policy failure, but instead an evidence-based response to new information.The Conversation

Fiona Russell, Senior Principal Research Fellow; paediatrician; infectious diseases epidemiologist, The University of Melbourne and John Hart, Clinical researcher, Murdoch Children’s Research Institute

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Egyptian Couple Shot by Muslim Extremists Undaunted in Ministry


Left for dead, Christians offer to drop charges if allowed to construct church building.

CAIRO, Egypt, June 9 (CDN) — Rasha Samir was sure her husband, Ephraim Shehata, was dead.

He was covered with blood, had two bullets inside him and was lying facedown in the dust of a dirt road. Samir was lying on top of him doing her best to shelter him from the onslaught of approaching gunmen.

With arms outstretched, the men surrounded Samir and Shehata and pumped off round after round at the couple. Seconds before, Samir could hear her husband mumbling Bible verses. But one bullet had pierced his neck, and now he wasn’t moving. In a blind terror, Samir tried desperately to stop her panicked breathing and convincingly lie still, hoping the gunmen would go away.

Finally, the gunfire stopped and one of the men spoke. “Let’s go. They’re dead.”

 

‘Break the Hearts’

On the afternoon of Feb. 27, lay pastor Shehata and his wife Samir were ambushed on a desolate street by a group of Islamic gunmen outside the village of Teleda in Upper Egypt.

The attack was meant to “break the hearts of the Christians” in the area, Samir said.

The attackers shot Shehata twice, once in the stomach through the back, and once in the neck. They shot Samir in the arm. Both survived the attack, but Shehata is still in the midst of a difficult recovery. The shooters have since been arrested and are in jail awaiting trial. A trial cannot begin until Shehata has recovered enough to attend court proceedings.

Despite this trauma, being left with debilitating injuries, more than 85,000 Egyptian pounds (US$14,855) in medical bills and possible long-term unemployment, Shehata is willing to drop all criminal charges against his attackers – and avoid what could be a very embarrassing trial for the nation – if the government will stop blocking Shehata from constructing a church building.

Before Shehata was shot, one of the attackers pushed him off his motorcycle and told him he was going to teach him a lesson about “running around” or being an active Christian.

Because of his ministry, the 34-year-old Shehata, a Coptic Orthodox Christian, was arguably the most visible Christian in his community. When he wasn’t working as a lab technician or attending legal classes at a local college, he was going door-to-door among Christians to encourage them in any way he could. He also ran a community center and medical clinic out of a converted two-bedroom apartment. His main goal, he said, was to “help Christians be strong in their faith.”

The center, open now for five years, provided much-needed basic medical services for surrounding residents for free, irrespective of their religion. The center also provided sewing training and a worksite for Christian women so they could gain extra income. Before the center was open in its present location, he ran similar services out of a relative’s apartment.

“We teach them something that can help them with the future, and when they get married they can have some way to work and it will help them get money for their families,” Shehata said.

Additionally, the center was used to teach hygiene and sanitation basics to area residents, a vital service to a community that uses well water that is often polluted or full of diseases. Along with these services, Shehata and his wife ran several development projects, repairing the roofs of shelters for poor people, installing plumbing, toilets and electrical systems. The center also distributed free food to the elderly and the infirm.

The center has been run by donations and nominal fees used to pay the rent for the apartment. Shehata has continued to run the programs as aggressively as he can, but he said that even before the shooting that the center was barely scraping by.

“We have no money to build or improve anything,” he said. “We have a safe, but no money to put in it.”

 

Tense Atmosphere

In the weeks before the shooting, Teleda and the surrounding villages were gripped with fear.

Christians in the community had been receiving death threats by phone after a Muslim man died during an attack on a Christian couple. On Feb. 2, a group of men in nearby Samalout tried to abduct a Coptic woman from a three-wheeled motorcycle her husband was driving. The husband, Zarif Elia, punched one of the attackers in the nose. The Muslim, Basem Abul-Eid, dropped dead on the spot.

Elia was arrested and charged with murder. An autopsy later revealed that the man died of a heart attack, but local Muslims were incensed.

Already in the spotlight for his ministry activities, Shehata heightened his profile when he warned government officials that Christians were going to be attacked, as they had been in Farshout and Nag Hammadi the previous month. He also gave an interview to a human rights activist that was posted on numerous Coptic websites. Because of this, government troops were deployed to the town, and extremists were unable to take revenge on local Christians – but only after almost the
entire Christian community was placed under house arrest.

“They chose me,” Shehata said, “Because they thought I was the one serving everybody, and I was the one who wrote the government telling them that Muslims were going to set fire to the Christian houses because of the death.”

Because of his busy schedule, Shehata and Samir, 27, were only able to spend Fridays and part of every Saturday together in a village in Samalut, where Shehata lives. Every Saturday after seeing Samir, Shehata would drive her back through Teleda to the village where she lives, close to her family. Samalut is a town approximately 105 kilometers (65 miles) south of Cairo.

On the afternoon of Feb. 27, Shehata and his wife were on a motorcycle on a desolate stretch of hard-packed dirt road. Other than a few scattered farming structures, there was nothing near the road but the Nile River on one side, and open fields dotted with palm trees on the other.

Shehata approached a torn-up section of the road and slowed down. A man walked up to the vehicle carrying a big wooden stick and forced him to stop. Shehata asked the man what was wrong, but he only pushed Shehata off the motorcycle and told him, “I’m going to stop you from running around,” Samir recounted.

Shehata asked the man to let Samir go. “Whatever you are going to do, do it to me,” he told the man.

The man didn’t listen and began hitting Shehata on the leg with the stick. As Shehata stumbled, Samir screamed for the man to leave them alone. The man lifted the stick again, clubbed Shehata once more on the leg and knocked him to the ground. As Shehata struggled to get up, the man took out a pistol, leveled it at Shehata’s back and squeezed the trigger.

Samir started praying and screaming Jesus’ name. The man turned toward her, raised the pistol once more, squeezed off another round, and shot Samir in the arm. Samir looked around and saw a few men running toward her, but her heart sank when she realized they had come not to help them but to join the assault.

Samir jumped on top of Shehata, rolled on to her back and started begging her attackers for their lives, but the men, now four in all, kept firing. Bullets were flying everywhere.

“I was scared. I thought I was going to die and that the angels were going to come and get our spirits,” Samir said. “I started praying, ‘Please God, forgive me, I’m a sinner and I am going to die.’”

Samir decided to play dead. She leaned back toward her husband, closed her eyes, went limp and tried to stop breathing. She said she felt that Shehata was dying underneath her.

“I could hear him saying some of the Scriptures, the one about the righteous thief [saying] ‘Remember me when you enter Paradise,’” she said. “Then a bullet went through his neck, and he stopped saying anything.”

Samir has no way of knowing how much time passed, but eventually the firing stopped. After she heard one of the shooters say, “Let’s go, they’re dead,” moments later she opened her eyes and the men were gone. When she lifted her head, she heard her husband moan.

 

Unlikely Survival

When Shehata arrived at the hospital, his doctors didn’t think he would survive. He had lost a tremendous amount of blood, a bullet had split his kidney in two, and the other bullet was lodged in his neck, leaving him partially paralyzed.

His heartbeat was so faint it couldn’t be detected. He was also riddled with a seemingly limitless supply of bullet fragments throughout his body.

Samir, though seriously injured, had fared much better than Shehata. The bullet went into her arm but otherwise left her uninjured. When she was shot, Samir was wearing a maternity coat. She wasn’t pregnant, but the couple had bought the coat in hopes she soon would be. Samir said she thinks the gunman who shot her thought he had hit her body, instead of just her arm.

The church leadership in Samalut was quickly informed about the shooting and summoned the best doctors they could, who quickly traveled to help Shehata and Samir. By chance, the hospital had a large supply of blood matching Shehata’s blood type because of an elective surgical procedure that was cancelled. The bullets were removed, and his kidney was repaired. The doctors however, were forced to leave many of the bullet fragments in Shehata’s body.

As difficult as it was to piece Shehata’s broken body back together, it paled in comparison with the recovery he had to suffer through. He endured multiple surgeries and was near death several times during his 70 days of hospitalization.

Early on, Shehata was struck with a massive infection. Also, because part of his internal tissue was cut off from its blood supply, it literally started to rot inside him. He began to swell and was in agony.

“I was screaming, and they brought the doctors,” Shehata said. The doctors decided to operate immediately.

When a surgeon removed one of the clamps holding Shehata’s abdomen together, the intense pressure popped off most of the other clamps. Surgeons removed some stomach tissue, part of his colon and more than a liter of infectious liquid.

Shehata could not eat normally and lost 35 kilograms (approximately 77 lbs.). He also couldn’t evacuate his bowels for at least 11 days, his wife said.

Despite the doctors’ best efforts, infections continued to rage through Shehata’s body, accompanied by alarming spikes in body temperature.

Eventually, doctors sent him to a hospital in Cairo, where he spent a week under treatment. A doctor there prescribed a different regimen of antibiotics that successfully fought the infection and returned Shehata’s body temperature to normal.

Shehata is recovering at home now, but he still has a host of medical problems. He has to take a massive amount of painkillers and is essentially bedridden. He cannot walk without assistance, is unable to move the fingers on his left hand and cannot eat solid food. In approximately two months he will undergo yet another surgery that, if all goes well, will allow him to use the bathroom normally.

“Even now I can’t walk properly, and I can’t lift my leg more than 10 or 20 centimeters. I need someone to help me just to pull up my underwear,” Shehata said. “I can move my arm, but I can’t move my fingers.”

Samir does not complain about her condition or that of Shehata. Instead, she sees the fact that she and her husband are even alive as a testament to God’s faithfulness. She said she thinks God allowed them to be struck with the bullets that injured them but pushed away the bullets that would have killed them.

“There were lots of bullets being shot, but they didn’t hit us, only three or four,” she said. “Where are the others?”

Even in the brutal process of recovery, Samir found cause for thanks. In the beginning, Shehata couldn’t move his left arm, but now he can. “Thank God and thank Jesus, it was His blessing to us,” Samir said. “We were kind of dead, now we are alive."

Still, Samir admits that sometimes her faith waivers. She is facing the possibility that Shehata might not work for some time, if ever. The couple owes the 85,000 Egyptian pounds (US$14,855) in medical bills, and continuing their ministry at the center and in the surrounding villages will be difficult at best.

“I am scared now, more so than during the shooting,” she said. “Ephraim said do not be afraid, it is supposed to make us stronger.”

So Samir prays for strength for her husband to heal and for patience. In the meantime, she said she looks forward to the day when the struggles from the shooting are over and she can look back and see how God used it to shape them.

“There is a great work the Lord is doing in our lives, we may not know what the reason is now, but maybe some day we will,” Samir said.

 

Government Opposition

For the past 10 years, Shehata has tried to erect a church building, or at a minimum a house, that he could use as a dedicated community center. But local Muslims and Egypt’s State Security Investigations (SSI) agency have blocked him every step of the way. He had, until the shooting happened, all but given up on constructing the church building.

On numerous occasions, Shehata has been stopped from holding group prayer meetings after people complained to the SSI. In one incident, a man paid by a land owner to watch a piece of property near the community center complained to the SSI that Shehata was holding prayer meetings at the facility. The SSI made Shehata sign papers stating he wouldn’t hold prayer meetings at the center.

At one time, Shehata had hoped to build a house to use as a community center on property that had been given to him for that purpose. Residents spread a rumor that he was actually erecting a church building, and police massed at the property to prevent him from doing any construction.

There is no church in the town where Shehata lives or in the surrounding villages. Shehata admits he would like to put up a church building on the donated property but says it is impossible, so he doesn’t even try.

In Egypt constructing or even repairing a church building can only be done after a complex government approval process. In effect, it makes it impossible to build a place for Christian worship. By comparison, the construction of mosques is encouraged through a system of subsidies.

“It is not allowed to build a church in Egypt,” Shehata said. “We can’t build a house. We can’t build a community center. And we can’t build a church.”

Because of this, Shehata and his wife organize transportation from surrounding villages to St. Mark’s Cathedral in Samalut for Friday services and sacraments. Because of the lack of transportation options, the congregants are forced to ride in a dozen open-top cattle cars.

“We take them not in proper cars or micro-buses, but trucks – the same trucks we use to move animals,” he said.

The trip is dangerous. A year ago a man fell out of one of the trucks onto the road and died. Shehata said bluntly that Christians are dying in Egypt because the government won’t allow them to construct church buildings.

“I feel upset about the man who died on the way going to church,” he said.

 

Church-for-Charges Swap

The shooters who attacked Shehata and Samir are in jail awaiting trial. The couple has identified each of the men, but even if they hadn’t, finding them for arrest was not a difficult task. The village the attackers came from erupted in celebration when they heard the pastor and his wife were dead.

Shehata now sees the shooting as a horrible incident that can be turned to the good of the believers he serves. He said he finds it particularly frustrating that numerous mosques have sprouted up in his community and surrounding areas during the 10 years he has been prevented from putting up a church building, or even a house. There are two mosques alone on the street of the man who died while being trucked to church services, he said.

Shehata has decided to forgo justice in pursuit of an opportunity to finally construct a church building. He has approached the SSI through church leaders, saying that if he is allowed to construct a church building, then he will take no part in the criminal prosecution of the shooters.

“I have told the security forces through the priests that I will drop the case if they can let us build the church on the piece of land,” he said.

The proposal isn’t without possibilities. His trial has the potential of being internationally embarrassing. It raises questions about fairness in Egyptian society during an upcoming presidential election that will be watched by the world.

Regardless of what happens, Shehata said all he wants is peace and for the rights of Christians to be respected. He said that in Egypt, Christians have less value than the “birds of the air” mentioned in the Bible. According to Luke 12:6, five sparrows sold for two pennies in ancient times.

“We are not to be killed like birds, slaughtered,” he said. “We are human.”

Report from Compass Direct News