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comment by thundara
thundara  ·  3888 days ago  ·  link  ·    ·  parent  ·  post: Measles outbreak traced to fully vaccinated patient

Yep, this is a good thing for people to know (Especially with regards to flu). Infectious disease is always an arms race and while "prepare the immune system" is a pretty good gun, there is always the counter of "look like something else".

New strains are always a possibility, but from the point of view of the herd, it's best to promote whatever guns have the best chance of wiping out the bugger before it mutates and targeting so their aim is true. This holds true for vaccines, but also antibiotics, antivirals, antifugals, etc.

(Ignoring all discussion of vaccine lifetime and the chance a vaccine goes bad before delivery)