Direct evidence for T-cell immunity as a factor behind Covid-19 heterogeneity

Misleading headline. From the article:<p>&gt; Based on these data, it is plausible to hypothesize that pre-existing cross-reactive HCoV CD4+ T cell memory in some donors could be a contributing factor to variations in COVID-19 patient disease outcomes, but this is at present highly speculative<p>Also I recommend to read this: <a href="https:&#x2F;&#x2F;www.theatlantic.com&#x2F;health&#x2F;archive&#x2F;2020&#x2F;08&#x2F;covid-19-immunity-is-the-pandemics-central-mystery&#x2F;614956&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.theatlantic.com&#x2F;health&#x2F;archive&#x2F;2020&#x2F;08&#x2F;covid-19-...</a>

&gt; We demonstrate a range of pre-existing memory CD4+ T cells that are cross-reactive with comparable affinity to SARS-CoV-2 and the common cold coronaviruses HCoV-OC43, HCoV-229E, HCoV-NL63, or HCoV-HKU1. Thus, variegated T cell memory to coronaviruses that cause the common cold may underlie at least some of the extensive heterogeneity observed in COVID-19 disease.<p>Could we just start deliberately spreading these weaker cold viruses then?

So basically this is saying that previous exposure to various versions of the common cold can lead to some covid resistance?

How can I get infected with one of those other Coronaviruses?

From the abstract: &quot;We demonstrate a range of pre-existing memory CD4+ T cells that are cross-reactive with comparable affinity to SARS-CoV-2 and the common cold coronaviruses HCoV-OC43, HCoV-229E, HCoV-NL63, or HCoV-HKU1.&quot;<p>1. Populations may naturally have a head start towards herd immunity from COVID. 2. Sweden could be really close in that regard; their current super low daily mortality and declining cases may point towards herd immunity.

What&#x27;s up with the editorialised title, which clearly overstates the conclusions of the paper?

Does this imply that the COVID-19 virus will morph into the common cold virus?

This would also explain why the anti-body tests have proved so unreliable. A lot of people already have reactive anti-bodies without being exposed.

I believe Antibody is better than Vaccine <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Antibody#&#x2F;media&#x2F;File:Antibody_Opsonization.svg" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Antibody#&#x2F;media&#x2F;File:Antibody_...</a>