I mean common cold has been around for a long time. How has the immune system not learned how to fight it?
In: Biology
The Immune System is ready to combat most viruses and bacteria however it first has to create the correct anti bodies to get rid of them(they mutate and change all the time, so you could have a cold after the cold but from a different strain your immune system has to analyze all over again). This takes some time, that’s the main reason why you will always have the flu or common colds for 7-10 days, you can get well sooner by using penicillin but that’s only because it gets rid of most bacteria not the viruses themselves and often only the symptoms will be less severe as your immune system can concentrate on getting rid of the virus.
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