Mark the incorrect statement w.r.t. infection of Entamoeba histolytica
It is a protozoan parasite of human
It is characterised by constipation and abdominal pain
It is a parasite in small intestine of man
Houseflies act as mechanical carriers and serve to transmit the parasite from faeces of infected person to food and food products
Which one of the following is not a matching pair of a drug and its category ?
‘Vaccination' was invented by
When the children without $T-$ cells and $B-$ cells are kept in germ free isolation suits, then the disease is
Epidemiology deals with the study of
The harmful allele of sickle cell anemia has not been eliminated from human population. Such afflicted people derive some other benefit. Discuss.