Evidence reviews
Evidence reviews - November 2021
The following documents contain the evidence that was used to develop the November 2021 recommendations:
- Risk factors (update)
- Case definition
- Signs and symptoms (update)
- Children and young people
- Impact of vaccines (update) (updated August 2022)
The following documents contain the qualitative reviews conducted by SIGN:
Evidence reviews - December 2020
The following documents contain the evidence that was used to develop the December 2020 recommendations:
The following document contains the qualitative review conducted by SIGN:
Other supporting evidence
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