Ok, let's follow the science.
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Now, let's move on to the mortality rate. I agree with other posters that COVID-19 appears to be highly transmissible, but it also appears to be much less deadly than the "modeling" predicted (So I guess in a way your COVID-19/climate change comparison was valid). Several antibody studies have recently been completed and the results suggest the infection rate has been much higher (to be expected given the R factor) and the true mortality rate much lower.
Events were much less deadly than the models predicted because the models warned us to change our behavior by stay-at-home. No reputable sources claimed the death rate to be the ratio of deaths to confirmed cases. It looks like your pursuit of science has enabled you to correct your false assumption.
The article also notes that there is still no evidence for disease resistance due to these antibodies or how long any such resistance might last.
Dale B Dalrymple