I risultati sono simili a quelli di altri studi condotti su campioni di sangue di persone che hanno ricevuto il vaccino COVID-19 di Pfizer. La serie di due vaccini è risultata meno efficace contro Omicron, ma un terzo vaccino ha contribuito a rafforzare gli anticorpi.
Il gruppo di esperti dei CDC ha votato all'unanimità a favore dei vaccini Pfizer e Moderna dopo aver ascoltato un aggiornamento sulla sicurezza dei casi di trombosi con sindrome di trombocitopenia, una condizione che causa grossi coaguli che impoveriscono il sangue di piastrine, provocando emorragie incontrollate.
Il vaccino COVID-19 di Pfizer per i bambini di età compresa tra i 2 e i 5 anni si è arenato negli studi clinici, ha dichiarato venerdì l'azienda, segnalando un ulteriore ritardo nell'introduzione del vaccino per i bambini in età prescolare, proprio mentre l'Omicron si abbatte sugli Stati Uniti.
Più di 8 lettori medici su 10 che hanno partecipato a un nuovo sondaggio affermano di essere completamente vaccinati contro la COVID-19 e di aver già ricevuto un richiamo o di avere intenzione di farlo presto.
I funzionari sanitari del Texas hanno annunciato il primo decesso per COVID-19 legato alla variante Omicron. Potrebbe essere il primo decesso dovuto alla variante Omicron negli Stati Uniti.
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