Question

Give an account of some important viral diseases of human beings.

Answer 1

Some of the most important viral diseases of humans have been explained as follows:

1.Influenza: Influenza is also referred to as flu and is caused by the infection of Myxovirus influenza. Influenza virus exist into three forms namely A, B and C type of viruses. This disease primarily spreads through direct contact with an infected person and by droplet infection. Common symptoms of this disease include coughing, general weakness, inflammation of respiratory mucosa and nasal discharge.

2. Hepatitis: Hepatitis is a disease which affects the functioning of the liver. This disease can be caused by different strains of Hepatitis virus including Hepatitis A, B, C, D and G. Common symptoms of hepatitis include loss of appetite, dark yellow urine and light coloured stools.

3. Rabies: Rabies is caused by Lyssa virus and it is actively transmitted by the bite of a rabid dog or other rabid organisms. This disease is characterised by severe headache, painful muscle contraction and high fever.

4. Acquired Immunodeficiency Syndrome (AIDS): AIDS is caused due Human Immunodeficiency Virus (HIV) and it is primarily transmitted by exchange of body fluids through sexual contact and blood transfusions.