Critics have accused the US of hoarding the vaccine, which is not authorized in the country and will likely not be required to vaccinate US Americans.
Costa Rica received a shipment of 118,000 Pfizer/BioNTech coronavirus vaccines on Tuesday night and has been delivered 1.14 million total doses.
AstraZeneca's vaccine will initially be applied to health workers and other sectors exposed to contagion, such as police, firefighters and first responders.
More than 692 million doses of coronavirus vaccines have now been administered globally
The EMA continues to say the benefits of the AstraZeneca vaccine outweigh the risks.
AstraZeneca's shot, among the cheapest available, was billed as the vaccine of choice for poorer nations and the clot reports have had an impact beyond Europe.
Denmark, Norway and Iceland on Thursday temporarily suspended the use of AstraZeneca's vaccine, as the manufacturer insisted the vaccine was safe.
Costa Rica has purchased 1 million doses of the AstraZeneca vaccine, enough for 500,000 people.