Why do asymptomatic COVID-19 cases even happen?

[Yo_Mama_Been_Loggin]

THE FACTS OF COVID-19 include this disturbing reality: We have little idea who among us is spreading the disease.

Up to half of stealthy spreaders “feel fine” on Saturday night—but by the time they come down with the telltale cough, fever, and fatigue on Monday, they’ve potentially infected multitudes. Meanwhile, what could be an even more elusive bunch—people who are infected with the coronavirus but never, ever feel sick—make up 40 percent of infections in the United States, according to estimates from the Centers for Disease Control and Prevention.

What’s especially puzzling is why these two groups—presymptomatic transmitters and asymptomatic cases—appear so frequently. Other viruses, such as influenza and colds, spread silently too. But the extreme evasiveness of COVID-19 makes it harder to control.

Part of the problem is knowing so little about how the disease manifests. We know that people who are old, obese, or have other health conditions such as asthma or diabetes, are more likely to develop a severe form of COVID-19. But the people who get infected yet escape the worst of its wrath are harder to comprehend.

https://www.nationalgeographic.com/science/2020/07/why-do-asymptomatic-coronavirus-cases-even-happen-cvd/?cmpid=org=ngp::mc=crm-email::src=ngp::cmp=editorial::add=SpecialEdition_20200724&rid=FB26C926963C5C9490D08EC70E179424

[PoindexterOglethorpe]

1. My guess is that individual immune systems

are already highly idiosyncratic. Plus, this is a "novel" virus, meaning it is brand new to humans, which means not only do we not have anything resembling herd immunity, but we are each and every one of us completely on our own when it comes to our immune system fighting it. Clearly things like obesity, high blood pressure, diabetes, and so on, negatively impact on our own individual immune system's ability to fight back.

There is always the sobering reality that this may eventually kill us all.