Question

Which among the following statements are correct with respect to prevention of diseases?

• A. In case of measles, the patient must be kept in complete isolation.
• B. Polio drops are made up of weakened microorganisms.
• C. Bacterial diseases cannot be prevented by vaccines.
• D. Controlled breeding of mosquito can prevent malaria.

Answer 1

Answer: (A), (B), (D)

The correct options are
A In case of measles, the patient must be kept in complete isolation.
B Polio drops are made up of weakened microorganisms.
D Controlled breeding of mosquito can prevent malaria.

$\bullet$ Measles is a viral disease which is transmitted through air. The infected particles can spread to the surroundings through nasal or throat secretion of the infected individual.
$\bullet$ Vaccines are preparations containing dead or weakened microbes which stimulate the body to form cells that can effectively neutralise possible future infections. For e.g., oral polio vaccine is given to kids as a preventive measure for polio.
$\bullet$ Bacterial diseases like cholera and typhoid can be prevented by vaccines.
$\bullet$ Malaria is a protozoal disease which is transmitted through infected mosquitoes. Spraying insecticides, using nets, repellents and keeping surroundings free from water logged areas controls the growth of mosquitoes, reducing the chances of spread of the disease.