AFAIK, Singapore is the FIRST country to get the Pfizer vaccine in the third week of December 2020.
PS: Singapore also got 200,000 Sinovacs mainly because some people were worried about mRNA vaccines used on children. Only on the 2nd of June they allowed Sinovac under the "Special Access Route" . Also they
reiterated that Sinovac is not part of the national vaccine programme and therefore will
not be covered under the Vaccine Injury Financial Assistance Programme for COVID-19 Vaccination.
They very well know about the efficacy of it...
PPS:
Singapore Airlines Delivers First Shipment Of Covid-19 Vaccines To Singapore
21 December 2020 – Singapore Airlines (SIA) delivered the first shipment of Pfizer-BioNTech Covid-19 vaccines to Singapore earlier this evening on board one of its Boeing 747-400 freighters. This was also the first Pfizer-BioNTech vaccine shipment to be delivered to a country in Asia.
The vaccines were carried on board SQ7979, a scheduled freighter service from Brussels, Belgium, to Singapore. The flight departed on 20 December 2020 and arrived in Singapore on 21 December 2020 at approximately 1955hours.
The shipment was prioritised for loading into the aircraft in Brussels and was given similar precedence during unloading in Singapore. It was then transported to SATS’s cold-chain facility, Coolport, for subsequent storage and ground transportation.