Often, herd immunity is not shown when health authorities recommend a vaccine and implement a vaccination program under systematic surveillance.
While it is relevant to implement an HPV vaccine campaign in Viet Nam, it is important to note that one can be infected with multiple types of HPV.
Thus, while it is relevant to implement an HPV vaccine campaign in Viet Nam due to the high prevalence of infection with HPV 16 and/or 18, it is also important to inform the women who receive the vaccines that they are not protected against all high risk HPV types and that they still need cervical cancer screening.
Good vaccine characteristics formed a condition for implementing a new vaccine.
In 1991, the World Health Organization recommended that all countries should implement an anti-HBV vaccine in their national vaccination program by 1997 [ 20, 21].
In many countries, particularly resource poor countries, however, implementing an effective vaccine programme is challenging both in terms of cost and for determining the true burden of diseases, because many pneumococcal meningitis cases are culture negative [7], [8].
We excluded LHUs that were implementing an HPV vaccine catch-up programme targeting birth cohorts 1997 or 1998 at the time of the study.
WHO prequalification of vaccines also includes a fast-track option that can be implemented when a vaccine needs to be used as part of an emergency response.
This article discusses different aspects that should be considered when implementing a new RSV vaccine within national immunization schemes, regardless of the specific vaccine type that will become available.
However, as the current available vaccine can prevent only two types HPV 16 and 18, before implementing a large-scale vaccine campaign we need information about the prevalence of infection with only HPV 16 and 18 in Viet Nam.
