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Several countries are considering giving the second dose after 21 days.
German biotech company BioNTech and its American partner, Pfizer, warned in Frankfurt on Monday that there is no evidence that the coronavirus vaccine they developed together is effective if the second dose is given later, rather than at the time of the experiments.
“The safety and efficacy of the vaccine have not been studied at different dosing timeframes; most of the trial participants received the second dose at the intervals specified in the study,” passed.
We have no evidence that protection is maintained beyond 21 days after the first dose,
stressed in the joint statement.
For full protection, you must adhere to the maximum 42-day interval for the Pfizer / BioNTech vaccine, said the EMA, which authorized the vaccination on Monday, December 21. The effectiveness of the vaccine is based on research in which the two doses were administered between 19 and 42 days, the EMA noted, adding that full protection occurs seven days after the second vaccination.
Any deviation from this should be varied from the marketing authorization and supported by more clinical data; otherwise your use will differ from your intended use.
added the EMA.
MTI, which looked at the ad, noted that Germany on Monday considered delaying the administration of the second dose of the study by studying the British example, while Denmark decided to extend the interval between the two vaccines to six weeks.
Salvador Illa The Spanish Minister of Health announced on Monday that the Spanish Public Health Authority will deliver two doses of the BioNTech / Pfizer vaccine within a period specified by the manufacturers. In the UK, it was decided that the doses originally reserved for the second dose would also be given as the first dose, so that as many people as possible would receive it as soon as possible. The second dose is given 12 weeks later.
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