What Makes a Disease Contagious?

View as a webpage Daily Friday, September 29, 2017 What Makes a Disease Contagious? Can you catch a cold from your dog? Does "contagious" also mean a disease is dangerous? And how do vaccines help protect you? Take Quiz ›   •  How to Treat Heat Stroke   •  What to Do When Bedbugs Bite   •  'Why Do I Keep Sabotaging My Weight Loss Efforts?' In the News • Julia Louis-Dreyfus Reveals She Has Breast Cancer • Q&A: 'Childhood Alzherimer's' Explained • STDs Hit All-Time High in U.S. • No Finger-Prick Device for Diabetes • Nearly Half the World's Abortions Are Unsafe From the WebMD Network • Celebrities Who Get Migraines • What's Causing Your Indoor Air Pollution? • Tylenol Liver Damage: What You Should Know Featured • Do Adults Need Vaccines, Too? • Warning Signs of Bladder Cancer • Home Remedies: What Works? • 5 Ways to Treat DVT • Best and Worst Foods for Acne ADVERTISEMENT ADVERTISEMENT     ADVERTISEMENT   ADVERTISEMENT     WebMD.com   |  Mobile Apps WebMD Privacy Policy   © 2017 WebMD, LLC. All rights reserved. WebMD Office of Privacy | 1201 Peachtree Street, NE | Atlanta, GA 30361