How to Quit Vaping, According to Experts The New York Times Can you donate blood if you smoke? Can Vaping Cause Lung Cancer? Here's What We Know. Most Commonly Googled Questions About Blood Donation Answered by the Experts, Part 2 Stanford Blood Center 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