Why does one become immune and unable to pass on a certain disease after being infected by it?
In: Biology
Once you’re immune and the virus is defeated internally, there won’t be more viral pieces to shed and infect others. You could still handle virus portions and pass them along, but you wouldn’t be generating any yourself.
BTW, it’s expected that recovery will provide immunity at least for a while, but this hasn’t been tested or confirmed. But the concept of “herd immunity” is based on this.
OTOH, the annual flu shot is because each year the common flu mutates slightly or has its origin from a different area and is slightly different. The “novel corona virus” is new (novel) and so nobody has preexisting immunity to it.
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