$AIDS$ cannot be transmitted by:

$A$ rabid dog was seen in a colony and everyone was afraid of going near to it. Name the disease and state how this disease is transmitted. The dog is presently considered the reservoir of the disease. What is the meaning of 'reservoir' here? What steps should the Government take to prevent the spread of the disease?

The vaccination given for preventing tuberculosis is:

Choose the wrong statement.

Study the given chart carefully and fill in the blanks $(a)$,$(b)$,and $(c)$:

$S$.No.	Name of the disease	Causative organism	Mode of transmission
$1$. Polio	$(a)$	Infection of virus directly/orally
$2$. $(b)$	Lyssa virus	Virus enters human body with saliva of an infected animal
$3$. Typhoid	Salmonella typhi	$(c)$

Your younger brother observes some mosquitoes sucking juices of cut fruit pieces,though it is common knowledge that mosquitoes suck blood of humans. How will you explain this behaviour to him?