Maaike Swets

41 Surveillance of Severe Acute Respiratory Infections 2 Age groups 2023 2021 2022 2019 2020 2017 2018 0 5 101520253035404550 0 5 101520253035404550 0 20 40 60 0 20 40 60 0 20 40 60 0 20 40 60 Weeknumber Count Age groups 0−4 5−14 15−29 30−64 65+ RT−PCR tests by age group Supplementary Figure 7: Weekly count of PCR tests, split by age group. 2023 2021 2022 2019 2020 2017 2018 0 5 101520253035404550 0 5 101520253035404550 0 10 20 30 40 0 10 20 30 40 0 10 20 30 40 0 10 20 30 40 Weeknumber Count Age groups 0−4 5−14 15−29 30−64 65+ Contact and droplet precautions by age group Supplementary Figure 8: Weekly count of registration of contact and droplet precautions, split by age group.

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