Do You Know About The “Do-It-Yourself” Vaccine? By admin | December 10, 2014 | Uncategorized | aa senior care services, cold and flu, hand sanitizer, handwashing, Health tips | Like | What is that one thing you can do this holiday season to prevent colds and flu? Hand washing, hand washing and more hand washing! Hand washing is known as the “do it yourself vaccine”. During the holiday season many people attend holiday parties to celebrate with friends and family.