While doing ancestry research years ago, I learned I had a 2nd great uncle who immigrated to America from Romania aboard the RMS Carpathia in 1904. (Eight years later in 1912, this would be the first ship to come to the Titanic’s rescue, and six years after that would itself be sunk by a U-Boat.) He had left Romania likely to escape anti-semitism. He’d eventually find his way out to Denver. Sadly, he’d die in 1918 (t…
It's worth noting that the 1918 flu was unique in that it killed many young, healthy people. Corona virus is more typical in that it's primarily killing the very old or otherwise ill. https://www.worldometers.info/coronavirus/coronavirus-age-se...
Indeed, the problem with the coronavirus is that a better immune system can yield an overly intense immune reaction. If this happens, it yields a blockage of the lung capillaries. Hence, it becomes impossible to breathe. This extreme state lasts for about 2 days. This period might be only survived by utilizing a special type of breathing machine.
This over-reaction of the immune system does, however, happen to a lesser amount if the immune system is in a poor condition.
Hence, the coronavirus might, again, yield a survival of the weakest (like in 1918).
Source: an interview with the German virologist Prof. Dr. Dr. Alexander Kekulé, here: https://www.zdf.de/uri/a4719bf9-a2c5-4c66-ad92-105cd8dcfcba (in German)