Page 167 - Health, Population and Environment Education 10

3. We should use mosquito repellants.
4. We should sleep inside the mosquito net.
5. Anti-mosquito cream should be applied on exposed parts of body.

6. Full-sleeved clothes should be worn to avoid mosquito bite.
7. Puddles should be either drained or filled with sand to control mosquito breeding.
8. The surroundings of the house should be cleaned.

9. Windows and doors should be screened.
10. Kerosene or paraffin should be sprayed on the surface of ditches, puddle, ponds, etc.
11. Larvicidal fishes should be introduced in ponds, lakes, etc.

3. Viral Influenza

Viral influenza is a disease of respiratory system caused
by influenza virus of maxovirus group. This disease is
commonly known as flu. It is a pandemic disease. This
disease spreads very fast in a wide range and affects
a large number of population within a short period of
time.

Viral influenza can spread at any time, place and Person suffering from viral
population within a short period of time. Therefore, it is influenza
also called an international disease. The person of any Fig: 23
age can suffer from this disease. This disease get transmitted easily in schools, colleges,
factories, supermarkets, refugee camps, rallies and other crowded areas.

Causes
Viral influenza is caused by three types of influenza viruses. They are:

i. Influenza A ii. Influenza B iii. Influenza C
Among them, the influenza caused by influenza A virus is more dangerous and spreads
fast as compared to the influenza caused by B and C.

Modes of Transmission
Various modes of transmission of viral influenza virus are given below:

1. Direct contact with the patient
When a healthy person comes in close contact of the patient suffering from viral influenza,
s/he will gets infected. It is transmitted by shaking hands and hugging with the patient.

2. Droplet infection
Viral influenza is transmitted trough droplets of the patient while coughing, sneezing,
talking, etc.
GREEN Health, Population and Environment Education Book-10 167