Biology · Human defence responsesCrossoverWhy is it possible to catch the common cold many times but remain immune to measles after one infection?Ameasles only infects children, so adults cannot catch it againBrhinovirus (common cold) has hundreds of antigenically distinct strains; memory cells from one infection do not protect against different strains. Measles virus has stable surface antigens, so memory cells from one infection provide lifelong cross-protectionCmeasles virus produces more antibodies than cold viruses so the immune response is strongerDcold viruses destroy memory cells so no immunity is retained after recoveryChoose an answer — or press 1234
