Do you consider passive smoking is more dangerous than active smoking ? Why ?
Yes, passive smoking is also dangerous.
In passive smoking the tobacco smoke produced by the active smoker is inhaled by the non smoker.
It is more dangerous than the active smoking as the active smoking because the person inhales only $10 \%$ of the smoke while $90 \%$ of it is inhaled by passive smoker.
Sickle cell aneamia is more common in South Africa. This is due to
Nerve depressants
Cell mediated immunity is mainly a function of
Which part of the body is known as ‘Police guard'
A person is injected with globulin against hepatitis. This is