Dr. Ghebreyesus is the first African to be elected as head of WHO, despite controversies surrounding his election.
First malaria vaccine to be tested in Africa. The continent has the highest number of malaria cases in the world.
WHO recently put 12 types of bacteria in "urgent" priorities.
Health officials in Canada pointed out that racial discrimination can deteriorating physical health.
A mere high school experiment turned out to be a milestone in scientific research.
WHO reports that smoking could increase the number of deaths from 6 million to 8 million a year by 2030.
A new experimental vaccine gives 100 percent protection against Ebola infection.
Nestle, a Swiss company, has figured out a way to reduce the sugar content of its chocolates by 40 percent without changing the taste.
Scientists found that air pollution has traces of antibiotic-resistant bacteria that may cause health problems among people living in polluted cities.
This may sound bad as air pollution in Europe triggers about 467,000 premature deaths annually.
The World Health Organization has declared that Zika is no longer a global health emergency.