Nurse Carolina carries doses of the Pfizer vaccine against COVID-19 on the first day of a new vaccination center in Lisbon, Wednesday, Dec. 1, 2021. Long lines formed at the Portuguese capital's largest vaccination center to date as authorities there tried to encourage the 2% of the population who are not vaccinated yet, Europe's lowest rate, and to speed up the administration of booster shots. Despite its excellent vaccination record, cases have been rising non-stop over the past two months, although hospitalizations are far away from levels seen in previous surges. (AP Photo/Armando Franca)