The United Kingdom kept Costa Rica on a list of countries from which it only allows the arrival of nationals or residents, who must quarantine in hotels paid for out of pocket.
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.
More than 40 countries are still banning or restricting travel from Britain in a bid to contain a new strain of the coronavirus believed to spread faster.
