Grave's disease is caused by the hypersecretion of thyroid hormone and is associated with the

Recurrence of high temperature in malaria at intervals is due to completion of

Malaria is transmitted by ’Anopheles'. This was discovered by

$A$ : $A$ person who has received a cut accidentally and is bleeding needs to be given anti-tetanus treatment.
$R$ : Anti-tetanus injection provides active immunity by providing preformed antibodies for tetanus.

Do you consider passive smoking is more dangerous than active smoking ? Why ?