Why Do We Fall Ill? - Class 9 Science Quiz

Staphylococcus bacteria, specifically Staphylococcus epidermidis and Staphylococcus aureus, are known to contribute to the development of acne by colonizing hair follicles.

Breathlessness (dyspnea) is a primary symptom of various lung diseases, such as asthma, COPD, or pneumonia. Jaundice is typically related to liver function, and headache is a non-specific symptom.

Filariasis is a parasitic disease caused by microscopic, thread-like worms. Goitre is usually iodine deficiency, dialysis is a treatment, and Tetanus is bacterial.

Tuberculosis is a bacterial infection that primarily attacks the lungs. Rabies affects the nervous system, Diabetes is a metabolic disorder, and AIDS is an immune system condition.

Edward Jenner is the scientist credited with creating the first vaccine, which was for smallpox, using cowpox material. Note the spelling in the option is 'jennar'.

According to the World Health Organization, health is a state of complete physical, mental, and social well-being, not merely the absence of disease.

Sleeping sickness (African trypanosomiasis) is caused by the protozoan parasite Trypanosoma brucei, which is transmitted by the tsetse fly.

Acute diseases have a rapid onset and short duration. Viral fever is a typical acute illness, whereas Tuberculosis, Asthma, and Cancer are chronic conditions.