We all know smoking and vaping isn't great for your health. But it doesn't stop you from being a blood or plasma donor. Just make sure to wait one hour after donating Most Commonly Googled Questions About Blood Donation Answered by the Experts, Part 2 Stanford Blood Center Can you donate blood if you smoke? Can Vaping Cause Lung Cancer? Here's What We Know. How to Quit Vaping, According to Experts The New York Times