RT Journal Article SR Electronic(1) A1 Eurosurveillance editorial team YR 1998 T1 Influenza vaccine formula for 1998/99 JF Weekly releases (1997–2007) VO 2 IS 10 SP 1250 OP DO https://doi.org/10.2807/esw.02.10.01250-en UL https://www.eurosurveillance.org/content/10.2807/esw.02.10.01250-en