3. Why might human immunodeficiency viruses (HIV) not cause symptoms right away? Which cells do they infect?
Please help

HIV may not cause symptoms early on. People who do have symptoms may mistake them for the flu or monoSkin rash.

Symptoms may appear from a few days to several weeks after a person is first infected. The early symptoms usually go away within 2 to 3 weeks.

HIV (human immunodeficiency virus) is a virus that attacks the immune system

There are two types of HIV:

HIV-1, which causes almost all the cases of AIDS worldwide

HIV-2, which causes an AIDS-like illness. HIV-2 infection is uncommon in North America.

Explanation:

burning of wood and coal

explanation:

the panel also concluded there's a better than 95 percent probability that human-produced greenhouse gases such as carbon dioxide, methane and nitrous oxide have caused much of the observed increase in earth's temperatures over the past 50 years.