In the 20th century, a vaccine for yellow fever was developed to protect people in regions where the disease still flourishes. Epidemics continued, however, during every decade of the century ...

It took a group of scientists in Cuba at the turn of the 20th century to discover the real answer. In the Air The genesis of the discovery took place in 1879. After a yellow fever epidemic had ...

In the early 20th century, scarlet fever was one of the leading causes ... Thoroughly wash glasses, utensils, and plates after someone who is sick uses them. These items are safe for others ...