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Questions tagged [infection]

An infection is caused by the invasion of by pathogenic organisms (bacteria, viruses or worms) into a host. These pathogenic organisms live and multiply in its host and cause diseases by this.

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39
votes
2answers
42k views

Why don't we develop immunity against common cold?

We all suffer from common cold, and that, frequently. Why have we not developed immunity against it till now? By immunity I mean immunity as a species.
17
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1answer
4k views

Do we actually get more sick (flu/cold) during winter?

The word flu derives from the Italian phrase "influenza de freddo" meaning "influence of the cold". Indeed it is that time of the year when my colleagues seem to have the flu/cold more often than not....
3
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1answer
2k views

Elevated position effect on recovery times from upper respiratory infections at rest?

In nursing school, they advice for people with upper respiratory infections to be in a slightly elevated position at the head region when sleeping. My intuition of the reason is that the lymphatic ...
54
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2answers
11k views

What is the benefit of fever during infections?

When people get sick, they often develop a fever. What is the effect of an increased body temperature on viruses and bacteria in the body? Is it beneficial to the infected body? Importantly, often ...
28
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3answers
3k views

Why was disease transfer to the Americas one-way?

It is well known that the European colonists brought many infectious diseases to the Americas, and that these had a deadly effect on the native populations, because they had no immunity to them. Were ...
3
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1answer
621 views

Does long term use of antibiotics in humans actually lead to a greater risk of infection?

I've read about the overuse of antibiotics leading to antibiotic resistant strains of bacteria, so generally does long term use of antibiotics breed these strains in the bodies of antibiotic users and ...