Question: how effective is the flu shot uk?
Answer: Across all age groups including children, the flu vaccine prevented 52% of flu cases in 2015-16, 40% of flu cases in 2016-17, 15% of flu cases in 2017-2018 and 44% of flu cases in 2018-19 (see research by Public Health England on the effectiveness of flu vaccines in the 2015-16 season , 2016-17 season , 2017-2018 ...