Yes, you can usually donate blood as long as you aren’t currently having an outbreak of genital herpes symptoms. You should wait for 7 days after finishing a course of treatment for symptoms. If you are taking long term suppression treatment, you can donate blood if you do not have current symptoms. You can donate blood even if you have a sexual partner who has genital herpes, as long as you use protection like condoms and know you don’t have the infection yourself.