Are viruses infectious?

viral infections are the vruses which are air borne and are easily transmitted threw your respitory system some like colds flus etc are contangious also viral encephlitis however many air borne bacteria does not effect everyone. most viral infections that are transmitted from animal to animal will not effect humans viral infections have an incubation period and are hard to know during that period if a person is contagious most can be treated with antibiotics and iin some cases over the counter drugs etc you just have to wait for symptoms to appear