Fill in the blanks:
$(a)$ . . . . . . disease continues for many days and causes . . . . . . on the body.
$(b)$ . . . . . . disease continues for a few days and causes no long-term effect on the body.
$(c)$ . . . . . . is defined as physical,mental,and social well-being and comfort.
$(d)$ Common cold is a/an . . . . . . disease.
$(e)$ Many skin diseases are caused by . . . . . . .

Give two examples for each of the following:
$(a)$ Acute diseases
$(b)$ Chronic diseases
$(c)$ Infectious diseases
$(d)$ Non-infectious diseases

Name the target organs for the following diseases:
$(a)$ Hepatitis targets . . . . . . .
$(b)$ Fits or unconsciousness targets . . . . . . .
$(c)$ Pneumonia targets . . . . . . .
$(d)$ Fungal disease targets . . . . . . .

What is immunity?

Mahima is suffering from cholera. It is likely that the children sitting around her will be exposed to the infection:
$(a)$ Do all the students get infected and suffer from disease?
$(b)$ List two major symptoms of cholera.
$(c)$ What are the different ways of spread of this disease?

Priya's mother uses iodised salt at home. One day while cooking,Priya asked her mother about iodised salt. She said people who do not use iodised salt suffer from deficiency of iodine which leads to goitre and hypothyroidism.
$(a)$ What are the physical symptoms of goitre and hypothyroidism?
$(b)$ How will you inform others about the importance of iodised salt?
$(c)$ Is iodine a metal or a non-metal?
$(d)$ What are the physical properties of iodine?
$(e)$ What is the difference between iodised salt and normal salt?