Interesting read. Esp.:

3) Experience to date with coronavirus infection shows that the severity of the disease depends, inter alia, on the amount of virus that has entered the organism of the affected person. During an explosive course, it is expected that the virus concentration at the sites where more infected people accumulate will be very high. People who enter this environment will be at much greater risk not only of contagion itself, but also of severe course.

is something I had not on my personal radar, having subsumed the illness of medical personal like the doctor first to identify the problem to being overworked/underslept, coupled with enough exposure (even with sterilizing measures) to find a chink in personal immune system.
Had mostly thought that virus replicates until finished off by immune system or other way around.
But it definately is a valid assumption that large amounts of virus entering in short time multiply so fast that immune system is given no time to learn and react.

On:
4) If different pathogenic variants of the virus occur during an explosive epidemic, then the most aggressive, which multiply rapidly, are found to be advantageous. Aggressive virus clones in this situation produce more offspring than those with standard behavior. For this reason, the explosive course of the epidemic supports a more serious course of the disease.

I an uncertain that it is always true. In my mental models the asymptomatic spreader with no or mild symptoms is fueling the exponential growth seen after # of approx. 100, unless contained by drastic personal distancing as shown by Singapore and Taiwan, vs. South Korea, where they were able to curb growth when it reached low 4 figures.

Zdroj: https://translate.googleusercontent.com/translate_c?depth=1&rurl=translate.google.com&sl=cs&sp=nmt4&tl=en&u=https://www.lidovky.cz/relax/veda/velky-manual-ke-koronaviru-od-expertu-z-bulovky-co-vime-proc-jsme-v-karantene-a-jak-se-ochranit.A200317_155409_ln_domov_ele&usg=ALkJrhhFml1nck7y2jKDKLrZF6Zcq8OIeg


>English (GT)
>https://translate.google.com/translate?sl=cs&tl=en&u=https%3A%2F%2Fwww.lidovky.cz%2Frelax%2Fveda%2Fvelky-manual-ke-koronaviru-od-expertu-z-bulovky-co-vime-proc-jsme-v-karantene-a-jak-se-ochranit.A200317_155409_ln_domov_ele
>
>MartinaJ