4 ms·
What do you mean? According to WHO, measles caused 2.6 million deaths a year before 1980, but only 134 200 in 2015. Polio dropped from 350 000 cases in 1988 to
by acetoxy 10y ago
What do you mean?
According to WHO, measles caused 2.6 million deaths a year before 1980, but only 134 200 in 2015.
Polio dropped from 350 000 cases in 1988 to 74 in 2015.