News about Edward Jenner

DR MICHAEL MOSLEY: Not many of us would be willing to be infected with a potentially lethal new virus in the name of science. But early in the pandemic, in a first-of-its-kind trial for Covid, 36 healthy - and brave young people died of coronavirus, so scientists could learn as much as possible about this lethal new threat to science. I've participated in some gruesome and often painful experiments myself, including intentionally ingesting tapeworm eggs so that scientists at Liverpool University can investigate the worm's effect on my immune system. However, apart from the initial resentment of swallowing the eggs, I barely noticed them until I saw photographs from a pill camera that I took months later.

EXCLUSIVE: It's simple to get lost in medical jargon, particularly because terms used by experts can be terribly similar. Yet, they're often very different. For example, 'incidence' and 'prevalence', two of our vocabulary during the Covid pandemic's darkest days, cannot be used interchangeably. Here, the Mail's health team has delved into all of the confusing science to explain the difference between terms that are all too often mixed up.