The country's vaccination campaign has applied over 11 million doses, according to Social Security records. Which makes Costa Rica closer to reaching its herd immunity target of 4.2 million people fully-vaccinated of the total population of about 5.1 million inhabitants. 

Of the total vaccines applied, more than 4.4 million people received their first dose treatment, including more than 376,000 children. 

Also, over 4.1 million people completed their two-dose treatment, including more than 298,000 children. The country requires about 131,300 second doses to be applied in adults to reach its herd immunity. 

More than 2.2 million vaccinated people already received their booster shots. People over 18 years old are eligible for the booster, or third dose, but only if four months have passed since getting their second dose. 

Also, over 137,000 people already received their second booster shot or fourth dose. The second booster is available for people over 50 years old, contingent four months have passed since getting their first booster dose. 

This fourth dose is also available for people from 12 to 49 years old who are patients with immunodeficiency. These are people whose immune systems cannot fight infectious diseases and cancer.