Which type of medical insurance typically offers the least amount of flexibility in selecting a primary care physician

All insurance lets you choose your provider, it just depends if they are in network or out of network. You will pay more out of pocket for out of network physicians, but the amount of choice you have is the same.

To check their medical records to see if they have had chicken pox before, if they haven’t, monitor their temperature, drink plenty of fluids, and stay away from small children and those who haven’t been exposed to chicken pox during the incubation period.