Oxygen is harmful for

Fill in the following table:

$S.No.$	Disease	Point of Entry	Target Organ
$1.$ Japanese encephalitis	$(a)$	$(b)$
$2.$ $HIV$	$(c)$	$(d)$
$3.$ Tuberculosis	$(e)$	$(f)$

How are signs of a disease different from symptoms of a disease?

State whether the following statement is true or false:
The diseases which last for only short periods of time are called chronic diseases.

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

Associate the following diseases/infections with their causative agents:
$(a)$ Sleeping sickness
$(b)$ $SARS$
$(c)$ Kala-azar
$(d)$ Acne
$(e)$ $AIDS$
$(f)$ Dengue fever
$(g)$ Malaria
$(h)$ Brain fever
$(i)$ Chickenpox
$(j)$ Polio