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There is no evidence that the vaccine they jointly developed against the coronavirus is effective if the second dose is administered later, rather than at the time of the experiments, German biotech company BioNTech and its American partner Pfizer warned in Frankfurt on Monday. .
The safety and efficacy of the vaccine have not been studied at different dosing times and most subjects received the second dose of the vaccine at the intervals specified in the study.
– is the subject of a joint statement by the two companies, which recalled that three weeks had elapsed between the administration of the first and second doses of the vaccine. They emphasized:
We have no evidence that protection is maintained beyond 21 days after the first dose.
For full protection, you must adhere to the maximum 42-day interval for the Pfizer / BioNTech vaccine, the European Medicines Agency (EMA) said on Monday, December 21.
It was noted that the effectiveness of the vaccine is based on research in which the two doses were administered between 19 and 42 days apart. Complete protection occurs seven days after the second vaccination. Additional:
Any deviation from this must also be varied from the marketing authorization and supported by further clinical data, otherwise your use will differ from the intended use.
Germany on Monday considered delaying the administration of the second vaccine dose by studying the British example, while Denmark decided to extend the interval between the administration of the two vaccines to six weeks.
Spanish Health Minister Illa Salvador said Monday that the Spanish public health authority would deliver two doses of the BioNTech / Pfizer vaccine within a period specified by the manufacturers. The British, for their part, decided to also give the doses originally reserved for the second dose as the first dose so that as many people as possible receive it as soon as possible. The second dose is given 12 weeks later.
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