ID 240015165 © Nialowwa | Megapixl.com
Sharing is not just caring, it's also about giving credit - add this image to your page and give credit to the talented photographer who captured it.:
direct indirect transmission contagious communicable disease viral agent infectious microbe pathogenic virus bacterial pandemic epidemic touch airborne droplets spreading health care screening test checkup trials risk plague containment conditions illness infection medical flu influenza protection outbreak potential danger threat analysis action plan deadly