epa08906277 A health worker prepares to receive the vaccine against COVID-19 at Santo Antonio Hospital, in Porto, Portugal, 27th December 2020. The first to receive the vaccine against the COVID-19 pandemic will be health professionals in Lisbon, Porto and Coimbra, after just hours from Portugal receiving the first batch of the Pfizer/BioNTech COVID-19 vaccine.  EPA/MANUEL FERNANDO ARAUJO