Immunity

S2 E2: Prem locates Dan and puts him in the old isolation ward as the village is cordoned off from the outside world while the pit, pub and shop close to prevent the spread of contagion. Vaccine arrives from Cardiff but there is an insufficient supply. Verity flirts with local rugby captain Dafydd while her father refuses an inoculation, claiming that faith will save him as he sits by Dan's bedside, risking his life. Owen accuses Pushpa of being the carrier, but when she claims that she was vaccinated in India the source of the disease becomes a mystery.