What Makes a Disease Contagious?

View as a webpage Daily Wednesday, November 29, 2017 What Makes a Disease Contagious? How do you catch a cold? Are "infectious" and "contagious" the same thing? We have these answers and more. Take Quiz ›   •  Vaccine Myths and Facts   •  Who Gets Hypertension?   •  Questions About Treatments for Lyme Disease In the News • Arthritis No Longer Just a Disease of the Old • CDC: HIV Diagnoses Happening More Quickly • FDA: Beware of Bone Treats for Dogs • Is It Time to Discontinue the Pap Test? • Sniffing Out the Best Allergy Treatment From the WebMD Network • Macular Degeneration • Alcohol and Alcoholism Quiz • What Is Trichomoniasis? Featured • Scarlet Fever Symptoms • Why Do Your Gums Bleed? • 10 Questions for Your Doctor About Hives • The Truth About 'Good' Cholesterol • What Is Popcorn Lung? 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