Not proof, but purely accurate analysis of data.
Search Assistant
Was there an uptick in Covid-19 cases among attendees to trump rallies, back during the pandemic?
Yes, research indicated that Trump campaign rallies were linked to significant increases in Covid-19 cases, with studies estimating over 30,000 confirmed cases and more than 700 deaths associated with these events. The rallies, particularly those held indoors, were considered high-risk for virus transmission due to the large crowds and lack of social distancing measures.
CNBC
Wikipedia
If you can find something that says different, I am sure we would all be interested.