South Korea had its deadliest day yet of the pandemic on Tuesday, with 293 deaths reported in the latest 24 hours, as the country grapples with a record surge in coronavirus infections driven by the fast-moving omicron variant. The 1,196 virus patients in serious or critical conditions were also a new high. Health officials said the country's medical response remains stable following efforts to expand resources, with more than 30% of intensive care units designated for COVID-19 treatment still available. But the strain on the hospital system is expected to increase in coming weeks, considering the time lags between infections, hospitalizations and deaths.