RT Journal Article SR Electronic(1) A1 Handysides, S YR 2001 T1 Risk of measles and pertussis associated with exemption from vaccination JF Weekly releases (1997–2007) VO 5 IS 1 SP 1831 OP DO https://doi.org/10.2807/esw.05.01.01831-en UL https://www.eurosurveillance.org/content/10.2807/esw.05.01.01831-en