Prevention is always better than cure as a disease always causes some damage to the body, loss of working days, besides expenditure on medication. The important precautions for preventing diseases are (i) Hygienic environment (ii) Personal hygiene (iii) Proper nutrition(iv) Clean food (v) Clean water (vi) Regular exercise and (vii) Relaxation. Every body should also be aware of diseases and their spread. A regular medical check up is also required. Diseases which are transmitted from, one individual to another directly or indirectly are called infectious diseases. Such diseases are acquired, not inherited. If we prevent the entry of the diseases causing pathogens into our body, then we can prevent the disease from occurring instead of curing the disease after suffering from it.