evidence: Now the challenge is to make these vaccines available to people around the world. It will be key that people in all countries — not just in rich countries — receive the required protection. To track this effort we at Our World in Data are building the international vaccination dataset that we make available on this page. It is updated each morning, with the most recent official numbers up to the previous day. [...] This data is only available for countries that report the breakdown of doses administered by first and second doses by age. [...] The following chart shows the share of the population in each age group that has received a booster dose.