Changes

Viruses have long been known to us, with efforts to combat them including isolation, herbal remedies, and even using infected material to create antibodies tried already by the 17th century. With the discovery of important filtering techniques, it became possible to isolate viruses from other microbes. However, only since the 1930s have we been able to observe viruses and only since the 1950s do we now know what they are made of. Today's researchers are finding new strains of viruses regulary regularly with more than 2000 currently known to us.