In June 2016, Public Health England, the executive body charged with protecting health and wellbeing and reducing health inequalities, issued a new algorithm for the vaccination of individuals with uncertain or incomplete immunisation status.
Whilst the algorithm (presented here in the form of a flow chart), mainly focuses on those under 10 years old, it does include information on the approach to adopt for those aged up to 25.
It also includes basic information on when to administer the PPV, flu and shingles vaccine to adults.
The algorithm is scheduled for review in July 2017.