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www.healthline.com/health/cold-flu/contagious

Apr 3, 2017 ... Am I Too Sick or Contagious to Go to Work? ... The flu is a viral infection caused by the influenza virus that targets your head and chest. You'll ...

www.nhs.uk/chq/Pages/1068.aspx?CategoryID=67

How long you're infectious after a viral infection depends on the virus that caused the infection. Most viral infections are infectious before you start feeling unwell ...

www.mayoclinic.org/diseases-conditions/infectious-diseases/expert-answers/infectious-disease/faq-20058098

As you might think, bacterial infections are caused by bacteria, and viral infections are caused by viruses. Perhaps the most important distinction between  ...

www.webmd.com/a-to-z-guides/bacterial-and-viral-infections

Apr 25, 2017 ... The Differences Between Bacteria and Viruses; Diagnosis of ... which are ways the immune system tries to rid the body of infectious organisms.

m.kidshealth.org/en/teens/contagious.html

Infectious diseases are caused by microscopic germs (such as bacteria or viruses) that get into the body and cause problems. Some — but not all — infectious ...

www.medicinenet.com/how_long_is_a_cold_or_flu_contagious/article.htm

Cold viruses in droplets are spread mainly hand to hand. These droplets contain the infectious viruses.

www.virology.ws/2014/10/08/the-incubation-period-of-a-viral-infection

Oct 8, 2014 ... Whether or not an infected person is contagious (i.e. is shedding virus) during the incubation period depends on the virus. For example, Ebola ...

www.parents.com/health/cold-flu/cold/is-my-child-contagious

Because colds are caused by viruses, antibiotics are ineffective, and the .... Viruses that cause fevers are contagious as long as the fever is above a 100.4 ...

www.womenshealthmag.com/health/life-of-a-virus

A contagious virus generally attacks your body over 10 days. View our sample timeline of the life of a virus for more info.