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The average incubation period for flu type A is 1 to 4 days, according to the Centers for Disease Control and Prevention. Some people can remain infectious for up to 7 days. More »

www.reference.com Health Conditions & Diseases Cold & Flu

Rabies was discovered as a human disease by Girolamo Fracastoro, a 16th century Italian physician. The disease has been recognized as an animal disease for thousands of years. The rabies vaccine was developed in 1885 by ... More »

www.reference.com History Inventions

The life cycle of the rabies virus is transmission, incubation, early symptoms (prodrome period) and encephalitis phase. Rabies is transmitted to a human or other animal through saliva from an infected animal, in which c... More »

www.reference.com Science Biology
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The usual incubation period for the flu virus is one to four days, although the average is about two days, according to the U.S. Centers for Disease Control and Prevention. In most healthy adults, the virus is transmissi... More »

www.reference.com Health Conditions & Diseases Cold & Flu

The typical incubation period for influenza viruses such as influenza A is about one to four days, averaging about two days, explains the Centers for Disease Control and Prevention. Healthy adults become infectious about... More »

www.reference.com Health Conditions & Diseases Cold & Flu

The incubation period for the flu is between one to four days and averages two days, according to the Centers for Disease Control and Prevention. Healthy adults can infect others one day before developing symptoms and up... More »

www.reference.com Health Conditions & Diseases Cold & Flu

Around 5 to 20 percent of the United States population gets the flu annually, with over 200,000 infections resulting in hospitalizations, according to the Centers for Disease Control and Prevention. Influenza is caused b... More »

www.reference.com Health Conditions & Diseases Cold & Flu