Greta Thunberg is against vaccine nationalism, she says it's unethical to vaccinate the young and healthy that don't really need the vaccines. She addresses the issue of vaccine inequality and says that the vaccines should be distributed to 3rd world countries where people aren't in good health and do need the vaccine more than healthy people in 1st countries. Here is an article from the World Health Organization: https://www.who.int/news/item/19-04-2021-greta-thunberg-climate-and-environment-activist-joins-world-health-organization-s-call-for-vaccine-equity