Practice Questions

1.State how measles is transmitted

Transmission is by air, through droplet infection. An infected person will cough or sneeze expelling droplets that contain the measles virus, an uninfected person will breathe in these droplets and become infected.

2. What are the symptoms of an early stage HIV infection

After infection the person experiece a flu like virus

3. How would it be best for a farmer to protect the crops against TMV

TMV is a virus, so chemical treatments like fungicides or antibiotics won’t work. Prevention is mainly by using resistant varieties and good field hygiene such as disinfecting tools.