Covid-19. A third dose of Pfizer vaccine will “probably” be needed

People who received the vaccine from Pfizer will have ” probably “ need a third dose within six months to a year, then probably an injection each year, said the boss of the American pharmaceutical giant.

“A plausible hypothesis is that a third dose will probably be needed, between six months and twelve months, and from then on there will be one vaccination again every year, but all of this needs to be confirmed.”, said Albert Bourla, CEO of Pfizer, in statements made public this Thursday by the channel CNBC.

“And on the other hand, the variants will play a key role”, he added.

“It is extremely important to reduce as much as possible the number of people vulnerable to the virus”, continued Albert Bourla.

“We don’t know everything”

Earlier today, the director of the anti-Covid administration Biden He also assured that Americans should expect to receive a booster of the vaccine in order to protect them against coronavirus variants in circulation.

“We don’t know everything at this stage”, admitted Dr. David Kessler, during a hearing before the American parliamentarians.

“We are studying the duration of the antibody response”, he clarified. “It seems strong but it is experiencing a certain decline and the variants are a challenge”.

“For logistical reasons, and only for logistical reasons, I think we should consider that there may be a recall”, Kessler said.

95% efficiency

The Pfizer / BioNTech alliance had already announced in February to study the effects of a third dose of its vaccine against variants in a clinical study.

Administered in two doses, this vaccine uses like that of Moderna, innovative messenger RNA technology, which had never been used in real life before.

At this stage, these two vaccines are the best performing with an effectiveness of 95% for that of Pfizer / BioNTech and 94.1% for Moderna against Covid-19, according to clinical studies.

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