COVID-19 vaccinations cut back over holidays due to staff shortages, Ontario government says Over the holidays, criticism surfaced online after the government scaled back on vaccinations due to staffing shortages with clinics closed on Christmas Day and Boxing Day and only a few clinics were open the following two days.[ Sign up for our Health IQ newsletter for the latest coronavirus updates ]So far, 19 hospitals across Ontario are equipped with administering the immunizations.Health Canada approved the Pfizer-BioNTech vaccine on Dec.