Infectious diseases are caused due to various types of microbes.
Microbes present in the environment gain entry into the body via air, water and
food They multiply in the body and make the person sick. The sick person
releases them in greater number in the environment thus infecting many
people.Our body has a defence system which is capable of fighting against the
genns. Modem drugs assist ow defence system. Disease results from a disturbance
in the balance between man and his environment. Improvement in the health
status of our people requires clean drinking water, adequate living conditions
and proper sanitation.
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