Why colds develop in stages.

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First the sore throat and when it’s nearly over the nose is running and stuffed and when that’s nearly over, the coughing starts. Does that mean a person is contagious the whole time and infects itself (different kind of cells)?

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bacteria grow exponentially, so it grows over time and as time goes on (until your immune system ramps up enough) you get more contagious. Plus your immune system also takes some time after it realizes you’re sick before it can kick in, stop the bacteria/virus/whatever and get you back to healthy

Colds develop in stages because the body’s immune system responds to the virus that causes the cold in different ways at different times.

When you first become infected with a cold virus, your body’s immune system recognizes the virus and begins to produce antibodies, proteins that help fight off the infection. This initial response is what causes the early symptoms of a cold, such as a runny nose, sneezing, and congestion.

As the infection progresses, your body’s immune system continues to produce more antibodies and other immune cells, such as white blood cells, to fight off the virus. This increased immune response can cause more severe symptoms, such as a high fever and body aches.

Finally, as the infection begins to subside, your body’s immune system starts to clear out the remaining virus and repair any damaged tissue. This can cause the final symptoms of a cold, such as a cough and fatigue.

Overall, colds develop in stages because the body’s immune system responds to the virus in different ways at different times, and this response causes the symptoms of a cold to change over the course of the infection.

Yes, a person with a cold is typically contagious throughout all stages of the infection, but no you won’t re-infect yourself. Once you have been infected with a cold virus, you will develop immunity to that specific strain of the virus. This means that your body will be able to recognize and fight off that particular strain of the virus if you are exposed to it again in the future.