There was news before on mRNA vaccines & the reason why it is 90+% effective. First, comparing it with a traditional vax like Sinovac (Coronavac) that uses killed virus to stimulate an immune response, mRNA differs in that the code to make the spike protein is injected & it teaches the cells to make the spike protein and thus stimulates the immune system. It was touted for it’s ability to make the host a dead end host, which means just in case an exposure happens, the immunity afforded kills the virus right away so the host is inable to transmit it. Coronavac, on the other hand, will PROTECT the host from a more severe disease by the immunity (albeit low) afforded but will still vent out the virus, para bang carrier na.
Since this is a new disease, they discover new things & now, they find out the host is not dead end when infected with the Delta.
The lesson here is still self preservation. Wear masks, avoid crowds.
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