COVID-19

Why do microbes kill some people but not others? This is the hardest question in all of medical microbiology. The reason it's so hard is because the answer depends not just on the microbe in question but also on the person.

It's unclear what planet World Health Organization Director-General Tedros Adhanom Ghebreyesus is inhabiting, but it's certainly not this one.

If a new BBC Persian report is accurate, the death toll from coronavirus in Iran is far higher than the official numbers.

"When the facts change, I change my mind. What do you do, sir?"

As the Wuhan coronavirus (COVID-19) epidemic continues to spread -- and, at this point, it doesn't look to be stopping anytime soon -- pharmaceutical companies and governments are working together to make vaccines against it.

Before modern study of microbiology, how diseases spread was essentially unknown.