Governor: 'Light at the end of the tunnel' in virus fight

Pennsylvania, Gov. Tom Wolf speaks outside a Rite-Aid pharmacy in Steelton, Pa., that is administering COVID-19 vaccinations, Friday, March 5, 2021. (AP Photo/Matt Rourke)

Pennsylvania, Gov. Tom Wolf speaks with Darlene Morris, 83, as she waits to receive a COVID-19 vaccine at a Rite-Aid pharmacy in Steelton, Pa., Friday, March 5, 2021. (AP Photo/Matt Rourke)

Pennsylvania, Gov. Tom Wolf, center right, accompanied by Rite-Aid Chief Pharmacy Officer Jocelyn Konrad, tours a Rite-Aid pharmacy in Steelton, Pa., that is administering COVID-19 vaccinations, Friday, March 5, 2021. (AP Photo/Matt Rourke)

Pennsylvania, Gov. Tom Wolf tours a Rite-Aid pharmacy in Steelton, Pa., that is administering COVID-19 vaccinations, Friday, March 5, 2021. (AP Photo/Matt Rourke)

Shown is a sign outside a Rite-Aid pharmacy in Steelton, Pa., that is administering COVID-19 vaccinations, Friday, March 5, 2021. (AP Photo/Matt Rourke)

Pennsylvania, Gov. Tom Wolf speaks with Darlene Morris, 83, as she waits to receive a COVID-19 vaccination at a Rite-Aid pharmacy in Steelton, Pa., Friday, March 5, 2021. (AP Photo/Matt Rourke)

Pennsylvania, Gov. Tom Wolf, center, accompanied by, Department of Human Services Secretary Teresa Miller, left, and Rite-Aid Chief Pharmacy Officer Jocelyn Konrad, speaks outside a Rite-Aid pharmacy in Steelton, Pa., that is administering COVID-19 vaccinations, Friday, March 5, 2021. (AP Photo/Matt Rourke)