How COVID-19 hybrid immunity could be a potential pandemic game-changer

Mixing vaccines could offer a stronger immune boost, preliminary data suggests.

9/17/2021 4:27:00 PM

Mixing vaccines could offer a stronger immune boost, preliminary data suggests.

Some researchers are pointing to preliminary data suggesting that mixing different COVID-19 vaccines could offer an even stronger immune boost.

Pfizer data supports booster shots after 6 monthsIn a briefing to the Food and Drug Administration, Pfizer said data supports a booster shot six months after a primary vaccine dose. The FDA advisory committee will hold a hearing to discuss the data.Matt Rourke/AP

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With the FDA gearing up to decide if all Americans need booster shots, some researchers are pointing to preliminary data suggesting that mixing differentvaccinescould offer an even stronger immune boost.For now, data is too sparse to support a mix-and-match strategy, experts say. But scientists are learning more about just how strong the immune response can be for someone who has previously been infected with COVID-19 then gets the vaccine -- a phenomenon called"hybrid immunity."

MORE: COVID-19 live updates: NYC officials investigating 16 cases linked to concert"The best thing we can hope for is that three vaccine doses will emulate the super immune response, found among those previously infected with the virus," said Dr. Paul Goepfert, an infectious disease physician and director of the Alabama Vaccine Research Clinic."This [type of immunity] will protect against variants in the future." headtopics.com

David W Cerny/Reuters, FILEVials of Pfizer-BioNTech and Moderna vaccines are seen in the town of Ricany near Prague, Czech Republic, Feb. 25, 2021.With the nation still slogging through the pandemic and contending with the delta variant’s threat of breakthrough infections,"super immunity" becomes an appealing concept.

In one reviewrecently published in Science, people with that hybrid immunity see an immediate and"striking" improvement in protection -- up to a 100-fold increase in their antibody response as compared to what they built up after their COVID-19 infection -- Dr. Shane Crotty, review author and virologist at the La Jolla Institute for Immunology, said.

Experts are also discovering these hybrid antibodies appear to be more versatile and recognize more variants, including those as distant as the original SARS virus, Crotty said.One yet to be peer reviewedstudy of previously COVID-19 positive patientswho were then vaccinated at least six months later found participants were able to fight off both variants of concern tested: delta, the most infectious, and beta, the most lethal.

"With prior infection, their antibodies are able to recognize numerous variants, but with the addition of the vaccine, they are able to generate a large number to have a stronger effect against the virus," Crotty said.Like an exercise regimen that pairs weight lifting with cardio, Crotty explained that these individuals benefit from the combination of quantity and varied quality of the immune response they build. And that could indicate promising signs for boosters. headtopics.com

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Scientists are seeking to replicate that strong protection, but without people having to contract COVID-19, as it’s universally agreed that infection is not an optimal immunization course.MORE: Few people medically exempt from getting COVID-19 vaccine: Experts

Instead, they’re hoping booster doses of vaccines could convey a similar effect.But timing is key when it comes to additional doses, whichever vaccine is given. Researchers say that exact right interval when immune response has matured -- but before protection begins to wane -- is the ideal target.

"Our immune system is built to have repeated exposures to the same antigen," which will"substantially" enhance immune protection, Dan Barouch, director of the Center for Virology and Vaccine Research at Beth Israel Deaconess Medical Center said.

Matt Rourke/APA syringe is prepared with the Pfizer COVID-19 vaccine at a clinic at the Reading Area Community College in Reading, Pa., Sept. 14, 2021.Experts are still gleaning what exactly is the benefit of this enhanced immunity, though it’s not novel to headtopics.com

.Flu vaccines, for example, are “boosted" for children receiving them, while adults receive one dose, yearly."This is because of hybrid immunity. Adults have already been exposed to influenza and have primed their immune response," Goepfert said.

MORE: Teens turn to COVID-19 vaccine advocacy as most state laws prohibit minors from being vaccinated without consent"What we have seen is that waiting six months does mount a better immune response later," he added."It seems that our immune system likes to rest and develop antibodies, and then mount a stronger response when it sees the same pathogen again later on."

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There is not enough data yet to say if the mix-and-match approach of priming one vaccine and boosting with another is going to offer better or more durable protection. But while the jury remains out, experts are hopeful."The mix-and-match approach in vaccine administration has been studied for decades, but unfortunately not for COVID," Barouch said."while larger studies are underway, it is best to stay with the same vaccine for the booster, if approved."

Read more: ABC News »

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Until and unless the FDA has fully authorised this, news agencies have no right to report it. It causes more distrust in this vaccine cause it just sounds made up and experimental. This research was done by a vaccine maker not a govt body. The conflict of interest is glaring. demayoshitshow Boy oh boy I sure do love being in the twilight zone

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'could' thats__baby Do we get free Visine with the booster? I know they fucking lying lmmfao. Now they want you to mix em. AJoke 🙄 skrloverespect Mfs really going turn into zombies or some shit🤦🏾‍♂️🤷🏾‍♂️🤣🤣 Hell yeah. Give me all the infinity vaccines so I can be on some Thanos type shit. I can't wait for the booster.

ha ha ha! let’s mix them and see what happens….

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Could / Might / Maybe Etc. The World Is Fed Up Of Hearing / Seeing This!🙄🤦🏽‍♂️😷 We Need Facts / It Works / Here Are The Results / 20 Years From Now This Is What Will Happen! If Vaccines Hurt People, There Will Be Compensation / Accountability.

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