How can you tell if a girl is going through puberty?

The first sign of puberty in girls is usually that their breasts begin to develop. Its normal for breast buds to sometimes be very tender or for one breast to start to develop several months before the other one. Pubic hair also starts to grow, and some girls may notice more hair on their legs and arms.

How many people died from yellow fever?

What is the global impact of yellow fever? Yellow fever virus is estimated to cause 200,000 cases of disease and 30,000 deaths each year, with 90% occurring in Africa. 20% to 50% of infected persons who develop severe disease die.