All Singapore Citizens (SCs) and Permanent Residents (PRs) for whom vaccination is recommended under the NAIS are eligible for subsidies for the relevant vaccinations. Under the NAIS, measles vaccination (as part of the Measles Mumps and Rubella vaccine) is recommended for adults who have not been previously vaccinated, or lack evidence of past infection or immunity, while Tdap is recommended for pregnant women during 16-32 weeks of each pregnancy. Licensees may also further subsidise the remaining cost of vaccinations for personnel, at their discretion.