Vaccines are one of the most cost-effective and lasting health investments, playing a vital role in reducing child mortality. While Tanzania has high coverage in routine immunizations, discrepancies exist in terms of geographic location, socioeconomic status, and level of education. Faced with lack of electricity and inadequate roads in many regions, transporting supplies under continuous cold storage to Tanzania’s mostly rural population is a persistent challenge. Sector-wide obstacles, including a lack of trained health staff and sufficient financing, limit the country’s ability to supervise, monitor, and fund efforts.