Countries would have to cope as best they could, he said, guided by their individual epidemiological situation, available resources, vaccination-uptake status and socio-economic context. In recent weeks, countries in Europe and the United States have felt the full force of the Omicron wave; in the United Kingdom, which has reported most infections, daily COVID-19 cases peaked at more than 160,000 earlier this month. Scientists there say all nations are facing the same major problem: the sheer speed at which the variant spreads.