3 ms·
Flu immunity doesn't mean all that much because flu viruses mutate so quickly. That's why the flu shot has to be given every year: it protects against differen
by nostrademons 6y ago
Flu immunity doesn't mean all that much because flu viruses mutate so quickly. That's why the flu shot has to be given every year: it protects against different strains, whatever is predicted to be predominant that year.
Natural immunity is much more effective for viruses that don't change much: measles, polio, chickenpox, coxsackievirus (hand-foot-mouth), even common-cold coronaviruses.
- easytiger 6y agoInfant immune systems are significantly dependant on exposure to infections to workand transition from their in vitro system. Lack of natural exposure is already thought to be responsible for a whole host of medical issues.