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Can a strong immune system protect us from COVID-19?

An interesting case came across, from the Diamond Princess cruise liner, where 18% out of 700 infected people had no symptoms although they had tested positive. CDC estimates 25% of the population to be asymptomatic, and some other estimates range up to 30%.

One of the theories why COVID-19 doesn’t even cause a tickle in the throat of asymptomatic people is that they have a stronger innate immune response to the virus.

A group of Australian researchers has mapped immune responses from a group of COVID-19 patients. "We showed that even though COVID-19 is caused by a new virus, in an otherwise healthy person, a robust immune response across different cell types was associated with clinical recovery, similar to what we see in influenza", said one of the collaborators, Professor Katherine Kedzierska.

A citation from a recent report published in Nature Medicine states that: "Three days after the patient was admitted, we saw large populations of several immune cells, which are often a tell-tale sign of recovery during seasonal influenza infection, so we predicted that the patient would recover in three days, which is what happened".

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However, at this point, there is still a lot to learn. Many relatively young people without a history of serious disease, eventually find themselves on respirators fighting for their lives. Because of this, there is no way to make a clear prediction that someone is safe.

What can we say for sure is that a healthy lifestyle - not smoking, drinking little or no alcohol, sleeping well, eating a balanced diet, taking regular moderate exercise and reducing stress is helpful for our immune systems to be in the best shape possible.


Disclaimer: The purpose of this text is to stimulate critical health thinking. Medical information does not amount to advice and if advice is needed an appropriate professional help should be asked. No warranties or representations are given in respect of the medical information, and the website operator should not be held liable if a user suffers any injury or loss after relying upon the medical information.

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