These frequencies will not necessarily involve medical calls or ambulances, but instead will be government agencies providing supplies or personnel to assist with food and equipment as needed.
Many National Guard units have access to statewide radio systems, either trunked or conventional.
For those who are interested, I thought I would post what I have found and add to it as new information comes in.
If you have any frequencies or information on COVID-19 response frequencies, feel free to send them to me on Twitter (@TheFedFiles) or email email@example.com
Connecticut Statewide CLMRN trunked radio system
National Guard heard on talk groups 40152 & 40154
STARCOM21 Statewide trunked radio system
Illinois Terrorism Task Force (ITTF) talk groups
Statewide Mutual Aid (SWMA) talk groups on the SAFE-T trunked radio system
KCICS trunked system, Army National Guard talk groups
TG1924 heard active
Possible conventional frequencies:
New Jersey State Police trunked system (Motorola)
NJ Army National Guard talk groups
TG57936 - 2B EOC NET
TXWARN Trunked Radio System talk groups:
138.5500, CSQ - Possible National Guard
Seattle - Century Link Events Center National Guard