I like giving these "services" a one off email address from my own catchall and then check in on it months later to see how they attempted to monetize the data. Would probably make an interesting time series info-graphic.
I do that with marathon entries. The worst offender by far has been the Rock N Roll series, who sold my email (runrocksoldthisemail@example.com) to several races throughout California. I chuckle every time something occasionally comes in to that address. 9/10 would recommend.
The right way to get notified when SARS-CoV-2 is near you is to follow the news and official sources, and whomever put this service up should be ashamed of themselves.
Yes, ashamed. Prefer? This is not the time to have preferences, but regardless, there are official sources that send you notifications.
You will know when the virus is near you before the operator of this service has a chance to update their data. The service is useless and any minimal false sense of security it gives could harm people by making them a bit less likely to follow official information sources and to prepare in time.
Which one of those will tell me when covid 19 is in my city and not bother me otherwise? Supposing I'm not willing to bet that my government will be operating with the efficiency of South Korea's, I mean.
This is a fantastic example of "app marketing". Build a simple app that is genuinely useful, then include a small link to the app creator. It is a great, non-BS (cough cough content marketing/SEO) way to drive new traffic.