31) In ancient time, the disease of chill and fever was...
a) malaria
b) typhoid
c) pneumonia
d) none of these
32) In human history, which disease was more fatal (killing people)?
a) bird flu
b) covid-19
c) pneumonia
d) malaria
33) The statement “ what is the cause of malaria” is….
a) biological problem
b) observation
c) hypothesis
d)deduction
34) In ancient time, the observation on malaria was/were………..
a) recurring attacks of chills
b) recurring attacks of fever
c) blood clotting is skin
d) both a and b
35) In ancient time, the malaria was more common in people living in…………….
a) cities
b) villages
c) low marshes
36) In 17th century, malaria was a major disease in:
a) America
b) Asia
c) Europe
d) Africa
