HIV is caused by A) a viral infection. B) a bacterial ...

[appyboo]

HIV is caused by
 
  A) a viral infection.
  B) a bacterial infection.
  C) exposure to a cancer-causing agent.
  D) homosexuality.

Question 2

Which of the following most accurately explains the lack of a common cold vaccine?
 
  A) Every time a vaccine is developed, the common cold virus mutates.
  B) The common cold is a virus, and vaccines only work with bacteria.
  C) The common cold is caused by a great number of different viruses.
  D) Medical scientists do not find colds serious enough for vaccination.

[harveenkau8139]

Answer to Question 1

A

Answer to Question 2

C

[appyboo]

Great answer, keep it coming

[olderstudent]

Thanks for the timely response, appreciate it