UK - London

There's mounting research to suggest that protecting people who are immuno-compromised from getting COVID is important not just for their sake – it could be critical in the effort to end the pandemic for everyone.

The evidence comes from two separate strands of studies.

Dr. Laura McCoy has been doing the first type. She's an infectious disease researcher at University College London.

"The group of people that I'm particularly interested in are those living with HIV," she says.

She's been studying how well their immune systems respond to vaccines against COVID-19 — specifically the Pfizer vaccine.

So far, it's worked quite well for HIV-positive people.

But there's a catch. In her studies, "all of our participants had really quite well-controlled HIV."