COVID emerged suddenly, spread rapidly and killed millions of people around the world. Since then, I think it's fair to say ...

Over the next century, less than 2 million would survive this and other communicable diseases brought by European explorers. Smallpox reached Massachusetts in 1633, brought by settlers from France ...

Diseases caused by pathogens are called communicable diseases. This means the disease can be transferred from an infected organism to another organism. There are other types of disease which ...