MMR vaccines may not always give lifelong immunity against measles

Falling uptake of the MMR vaccines has led to a resurgence of measles in countries such as the UK

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Receiving two vaccine doses against measles as a child may not always lead to lifelong immunity, despite what is commonly thought, according to a modelling study. Even so, this remains the best way to safeguard against the illness.

The level of protection seems to fall by a very small amount per year, which could explain why a growing number of people are catching measles despite having had two vaccines against it…

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