There is most and there is most... 49.9% with long-term effects would not be a good result.
Given that it is fair to assume that you meant the vast majority.
The "vast majority" being "ok" is still an open question.
As for the article you linked yourself,
The title is "
What’s the risk of COVID-19 for a healthy young person?" and within the article itself it focuses on
the risk being death. That is mischaracterization.
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There are also signs that younger people tend to develop fewer antibodies - which has consequences for natural immunity.
"
COVID-19: younger patients develop fewer neutralising antibodies, study finds
Analysis of blood samples from 175 patients with mild COVID-19 disease who were discharged from the Shanghai Public Health Clinical Centre as on February 26 revealed that about
30% of patients had unexpectedly low levels of antibodies against novel coronavirus (SARS-CoV-2). Ten patients had such low levels of neutralising antibodies that these could not be detected, while two patients showed very high levels.
The study threw up another surprise — t
he plasma of elderly and middle-age patients had significantly higher amount of neutralising antibodies and spike-binding antibodies than young patients. The median age of the patients was 50 years and the median length of hospital stay was 16 days and median disease duration was 21 days.
"
COVID-19: younger patients develop fewer neutralising antibodies, study finds
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Now while most people survive the risks to survivors are potentially widespread and potentially long-lasting. It is possible that this becomes a major secondary problem. The US Army would not make that move unless this was a significant risk.
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Overall my point is stop downplaying it. The risks to young people are still significant and are not fully expressed in the death rates quoted in articles like the one that you linked.