My Sister who is a Senior Staff Nurse in Leicester City Royal Hospital is just recovering from it. She is super fit with no underlying health Issues but it still knocked her for six for 3 weeks she suffered really bad and had to spend a week in ICU.
She knows of 2 other nurses that were not so lucky and passed away, and 3 other nurses that who she works with had it with very little symptoms.
Doctors do not know why it affects people differently some of her patients did have other issues but some did not but still ended up in ICU.
Her Advice to everyone.... what harm does it do to take precautions if wearing a mask saves just one person is it not worth it ?????????
And remember you may get it and have no symptoms but you will still pass it on. So in my opinion its selfish not to take precautions.