The World Health Organisation (WHO) says the 10 years yellow fever ‘booster’ vaccination is not necessary. An article published in WHO’s Weekly Epidemiological Record, obtained by the Ghana News Agency on Friday reveals that the Organisation’s Strategic Advisory Group of Experts on immunisation (SAGE) has reviewed the latest evidence and concluded that a single dose of vaccination is sufficient to confer life-long immunity against yellow fever disease. It said since yellow fever vaccination began in the 1930s, only 12 known cases of yellow fever post-vaccination have been identified, after 600 million doses have been dispensed. The article said evidence » Read More