hOver 200 viruses cause influenza and influenza-like illness which produce the same symptoms (fever, headache, aches and pains, cough and runny noses). Without laboratory tests, doctors cannot tell the two illnesses apart. Both last for days and rarely lead to death or serious illness. At best, vaccines might be effective against only Influenza A and B, which represent about 10% of all circulating viruses. (Source: Cochrane Summaries).
Posted on: Sat, 06 Dec 2014 09:20:00 +0000