NFIRS special studies allow effective gathering of data from the tens of thousands of fire departments, and hundreds of thousands of calls. Most recently, that has focused on COVID-19, and (to date) over 4 thousand departments have submit data on almost 300 thousand incidents:
Here is the NFIRS initial guidance on the COVID-19 special study: NFIRS Special Study - COVID-19
The data collected provides this dashboard: NFIRS Special Study - COVID-19 - Dashboard
Responserack provides services for volunteer fire departments; member information services, incident reporting, NFIRS and so much more.