The Family Tree of an Epidemic
We are in an arms race with influenza. Every few years, we roll out new vaccines, building up the immunity of the population before the winter epidemic hits. But then the viruses evolve, changing their appearance so our immune systems no longer recognize them effectively, which means we have to update our vaccines again.Some content is only viewable by ASA Members who subscribe to CHANCE. If you are an ASA member, log in to Members Only and look for CHANCE under your publications.