1025-028X 1025-028X S1025-028X2022000300103 00 12 2022 00 12 2022 31 3 103 108 1 2022 2 World Health Organization 2022 3 UK Health Security Agency (UKHSA) 2022 4 2022 71 18 18 638-40 5 World Health Organization 2022 6 European Centre for Disease Prevention and Control 2022 7 World Health Organization 2022 8 UK Health Security Agency (UKHSA) 2022 9 2022 7 7 7 594-5