It depends on the virus. It can immediately cause a disease (cold virus) or it can remain quiet for a long time before coming active (Epstein-Barr).
By being infected with the AIDS virus.
mosquitos that are infected with the disease. they inject the disease into your body when they bite you.
Viral load
HIV is a virus, and can't be removed from the body once infected.
Saliva has no Aids or HIV in an infected person but everything else can spread the virus.
Inoculation is when a dead virus (smallpox, for example) is injected into a person. The person's body creates antibodies to fight against the virus, even though the virus is dead. Should the person be infected with the live virus in the future, the body's immune system will recognise ,from the inoculation memory, the virus and bring fore natural antibodies to wipe out the live virus.
look up the answer
Ebola occurs through skin contact with an infected person or his or her body fluids, feces, body fluids, secretions, needles, by eating animals with virus, and contact with objects.
The Strand of genes is inserted into the cells DNA. This causes the cells to replicate the virus
NK cell
ofcourse. better to take vaccine
just because they havent come up with it yet