R0 (the basic reproductive number) tells us more than just how many people will be infected in a totally susceptible population. It can be used to calculate the how much vaccine coverage is needed to get to herd immunity. As…
You probably heard the term of herd immunity used in COVID-19 pandemic. What is herd immunity? It means when most of a population is immune to an infectious disease, it provides indirect protection—or herd immunity—to those who are not immune…
Send this to anyone who still thinks Covid-19 is basically the same as the flu. Support Vox by joining the Video Lab at or making a one-time contribution here: Covid-19, the disease caused by the coronavirus, has similar symptoms to…
A new virus, originating from Wuhan in China, is quickly spreading across the country and around the world. In this video, we highlight the key things you need to know about the outbreak, and how science can help control it.…