Re:Covid vaccine: First ‘milestone’ vaccine offers 90% prote...
by gus_massa on Monday November 09, 2020 @10:52AM
(#25036003)
I'm not sure about this vaccine, but it is a real possibility with other vaccines.
The injectable vaccine for polio stops the symptoms, but it doesn't stop the propagation of the virus from person to person.
The oral vaccine for polio also stops the propagation (that is better) but it is a live virus that can escape and produce polio in other unvaccinated persons (that is bad).
[So the current recommendation is to use oral version when polio is endemic, the injectable version when there has been no cases for a few years, and a mix of them in between.]
The injectable vaccine for polio stops the symptoms, but it doesn't stop the propagation of the virus from person to person.
The oral vaccine for polio also stops the propagation (that is better) but it is a live virus that can escape and produce polio in other unvaccinated persons (that is bad).
[So the current recommendation is to use oral version when polio is endemic, the injectable version when there has been no cases for a few years, and a mix of them in between.]