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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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.
kinshukkashyap's user avatar
55 votes
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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 ...
murmansk's user avatar
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17 votes
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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....
hello_there_andy's user avatar
3 votes
1 answer

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 ...
Léo Léopold Hertz 준영's user avatar
3 votes
1 answer

What fraction of human cells gets infected during a viral infection?

As I understand, if a cell gets infected during a viral infection then it eventually dies. If an individual does not die of an infection, the percentage of cells that gets infected in the course of ...
Epiousios's user avatar
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101 votes
3 answers

What's the evidence against SARS-CoV-2 being engineered by humans?

A couple of colleagues suggested in a discussion that the virus that causes COVID-19 appears to be made by humans, since nature could not have produced such an efficient virus — that spreads so fast ...
Alexei's user avatar
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27 votes
3 answers

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 ...
TRiG's user avatar
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5 votes
2 answers

Do organisms use detergents to fight off viruses?

Common advice against contracting bacteria or viruses is to wash your hands because soap dissolves the viruses' shell. Does any organism exploit this effect to protect against infection, e.g. by ...
streawkceur's user avatar
3 votes
1 answer

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 ...
docscience's user avatar