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Agreed. But I don't hear anyone talking about making a old style COVID vaccine that prevents infection, disease or transmission. That's what's different in th
by firmnoodle 5y ago
Agreed. But I don't hear anyone talking about making a old style COVID vaccine that prevents infection, disease or transmission. That's what's different in this case. We don't currently have what we many of us used to think of as a vaccine.
- dragontamer 5y agoThe vaccines are 90% effective against the original strain and Alpha to transmission / infection. Efficacy dropped to 60% vs Delta, and drops again to 30% vs Omicron. Boosters seem to rise back up to 90% vs Delta and 75% vs Omicron. That's why so many people are talking about boosters: it has a measurable impact on transmission for Omicron (and Delta).
- rsfern 5y agoWe are lucky we have vaccines at all; it was never a sure thing. Also, IIRC Sinovac’s Coronavirus vaccine is an “old style” inactivated virus vaccine, and the J&J one is an adenovirus vector vaccine. They are not as effective as the mRNA vaccines.