You can donate plasma as soon as you’ve recovered but you’ll need to wait four weeks before you can give blood. You’re recovered when all your spots are completely clean and dry and you’re feeling well. Your plasma can provide valuable antibodies (blood proteins your body makes to fight infections) for people at risk of chicken pox.
If you’ve been in close contact with someone who has chicken pox while they’re infectious, you’ll need to wait 3 weeks after the contact before you donate.
