A group of experts providing technical advice to Centers for Disease Control and Prevention (The Centers for Disease Control and Prevention in the USA) unanimously recommended giving priority to messenger RNA vaccines Pfizer-Biontech e Modern than that produced by Janssen (Johnson & Johnson) in relation to the fact that the latter offers less protection and more risks, particularly the rare but potentially fatal thrombosis. In the US, nine fatal cases have so far been recorded. The CDCs now have to make the final decision, after this non-binding advice.
Earlier this week, the Food and Drug Administration had published an updated guide on the risks of blood clotting stating once again that the benefits of the vaccine outweigh its risks. At the base of the opinion the 3.8 cases per million people considered higher than previously thought. Of all recipients of the viral vector compound, the same technique used for the development of the Astrazeneca vaccine, 36 were admitted to the ICU with the longest hospital stay being 132 days. The two viral vector vaccines are no longer used in Italy and in several European countries which had in any case set thresholds – between 55 and 65 years – under which the compounds were not administered.
Meanwhile, only yesterday the European Medicines Agency – which had authorized the use of both vaccines for the over 18s – had concluded that a booster dose of Johnson & Johnson’s Covid vaccine can be considered, at least 2 months after the first. , in people aged 18 and over. “The risk of thrombosis in combination with thrombocytopenia (TTS) or other very rare side effects after a booster are not known and are closely monitored”Announced the EU regulatory body in the note explaining the contents of the recommendation. As with all medicines, the EMA assures that it will continue “to examine all the data on the safety and efficacy of the Janssen vaccine”.
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