Why do some vaccines protect you for longer? – BBC News

www.youtube.com/watch?v=iOE4-3IsX3M

A measles vaccine can protect you for a lifetime. Tetanus gives you about 10 years of cover, while flu vaccines need updating every year. When it comes to Covid-19, we’re still not sure exactly how long protection from the vaccine lasts. Here's why you need more than one Covid jab. Please subscribe HERE bit.ly/1rbfUog #BBCNews

Watch the video at BBC News on Coronavirus Outbreak