https://televisionheaven.co.uk/articles/2020-survivors-and-the-corona-virus

Survivors also explored the need for isolation to guard against the illness, whether it was the village school being closed off or Abby Grant’s son’s Peter’s school being shut with supplies being left at the gate. A man at the school explains to Abby that a group, which included Peter, went to find somewhere they could isolate themselves.

The cowardly Tom Price also warns people such as Jenny Richards away from him

As late as the final episode of the first series, ‘A Beginning’ the survivors are wary about taking in a sick girl in case she is contagious.