I haven't seen this posted yet, so thought I would share. The message is in the title, and the article itself bbc.com/future/article/2021... explains why you shouldn't rely on a single dose of any of the available Covid vaccines, why two is better than one.
And until we know different, take care even once you've had two doses - they might protect you while you infect others.
Don't drop your guard!
Couldn't agree with this more.Thank you for posting.
Sue