https://www.selleckchem.com/products/ici-118551-ici-118-551.html y high in Korean adults, particularly among elderly people, even after a high uptake of pediatric PCVs. To achieve Measles and Rubella elimination and Polio Endgame goals, Tanzania implemented country-wide integrated Supplementary Immunization Activities (SIAs) in October 2019 involving two injectable vaccines of MR and IPV. The SIAs targeted children aged between 9 and 59months for Measles-Rubella and 18 to 42months for IPV vaccines. This article aims to share lessons learnt in the implementation of SIAs field guidelines in Tanzania in 2019 to inform future implementation of the SIAs within and outside the country's boundaries. Focus groups discussions (FGDs) were conducted among Regional Immunization and Vaccines Officers from all regions and National Supervisors and Partners responsible for implementing the SIAs. Key areas discussed were pre-planning activities, implementation, monitoring and evaluation of the SIAs based on key thematic areas including; planning and coordination, logistics management, trainings, and demand creation. Pre-described templates were used to guide the discussion and keep recorf funds to the operational level during implementation. The 2019 SIA achieved high administrative coverage as a result of effective coordination; adequate micro-planning; timely logistical preparations; and effective demand creation activities. Future campaigns need to give high priority to hard-to-reach and densely populated areas during planning and ensure timely disbursement of funds to the operational level during implementation.Coronavirus disease 2019 (COVID-19), which is caused by SARS-CoV-2, has been spreading throughout the world. To date, there are still no approved human vaccines for this disease. To develop an effective vaccine, the establishment of animal models for evaluating post-vaccination immune responses is necessary. In this study, we have identified a CTL epitope in the SARS-CoV-