the variola or smallpox virus infects the upper respiratory mucous of the orgasm attaches to it cells and send it DNA into the cell giving it instructions to make new variola virus after a while the cell dies or "explodes" leaving behind the new viruses and those virus infect other cells and so on
Smallpox usually infects any mouth or throat cells.
Small blood vessels of the skin and in the mouth and throat.
viruses are specific to the cells they infect called host cells
The reason we were able to "erradicate" (said that way because we have stores in labs) smallpox was because the human serotype is only able to affect humans. The smallpox vaccine is made from cowpox, which is similar enough to smallpox to provide immunity, but cannot infect us.
Infect cells.
One potential biological warfare agent that is a virus is smallpox. It is highly contagious and has the ability to cause severe illness and high mortality rates within populations. Its aerosolized form can potentially be used as a weapon to infect large numbers of people.
Bacteria are unicellular. The cells of the organism they infect are, quite often, part of a multicellular organism.
sperm cells
Viruses can only infect specific cells that have the necessary receptors on their surface for the virus to attach to. Each virus is adapted to infect specific types of cells based on these interactions. This specificity limits the range of cells that a virus can successfully infect.
Part of the reason is the difference in size. Another is that we consume bacteria but not actually infect them. It is a matter of terminology.
They infect your cells in a certain form.
somehow