Being similar to SARS is not meaningful evidence to draw a conclusion about COVID-19 (SARS-CoV-2 virus). His data is from 2015 and cannot possibly indicate that anyone had been afflicted with COVID-19 at that time.
What he is saying is that animal-to-human coronavirus transmission is common - which most people agree upon. ...and possibly implying that there may be cross-immunity protection - also as many suspect.
...but for COVID-19 specifically, there is no evidence that it circulated in rural China prior to entering Wuhan.
...and sadly China is blocking the collection of samples for exactly that sort of serology/antibody analysis.
What he is saying is that animal-to-human coronavirus transmission is common - which most people agree upon. ...and possibly implying that there may be cross-immunity protection - also as many suspect.
...but for COVID-19 specifically, there is no evidence that it circulated in rural China prior to entering Wuhan.
...and sadly China is blocking the collection of samples for exactly that sort of serology/antibody analysis.