The clinical trial data describing the safety and efficacy of the Pfizer and Moderna COVID vaccines were probably the most scrutinized science papers in history. They showed efficacy scores over 94 per cent when a prime dose was followed by a booster 21 or 28 days later. Yet the
National Advisory Committee on Immunization (NACI) now recommends extending that interval to up to four months, a substantial deviation from the manufacturers’ directions. This has upset many who feel that this departure is tantamount to experimentation without consent.
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