Israel’s coronavirus czar says first dose less effective than Pfizer indicated

Israel’s coronavirus czar Nachman Ash has reportedly said the first dose of Pfizer’s vaccine provides less protection against COVID-19 than the US pharmaceutical firm had initially indicated it would, and cautioned that it may not protect against new strains of the virus.

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Mutations arising in SARS-CoV-2 spike on sustained human-to-human transmission and human-to-animal passage

“Spike mutations have also occurred during interspecies transfers of SARS-CoV-2 from humans to animals, both during establishment of experimental models of COVID-19 and as an unintended consequence of human interactions with domestic, curated and commercial animals.”  More...