Official Yellow Fever vaccination centers are usually found at government-authorized hospitals, public health offices, international travel clinics, and some major private hospitals approved by national health authorities; after vaccination, you receive an International Certificate of Vaccination or Prophylaxis (ICVP), commonly called the “yellow card,” which is mandatory for entry into certain countries; the certificate becomes valid 10 days after the shot and, under current WHO rules, is valid for life, meaning booster doses are not routinely required for travel unless specifically advised by health authorities.