3 Medical Courses on Coursera in 2021
It’s important to understand how diseases spread in today’s world. It is clear that viruses can travel through the air, and this is why we have had epidemics of various sorts throughout history. In 1874 a measles epidemic swept the United States. By 1915, an outbreak of diphtheria occurred in Philadelphia (a city with a population of about two million people). This was followed by an outbreak of scarlet fever which killed more than daughters who came home from school sick on a hot summer day.