President Donald Trump's unproven, even far-fetched ideas for fighting coronavirus, including injecting disinfectants into people, triggered an outcry from health officials.

The Graduate Biochemists Association (GBA) urged the authorities concerned to include biochemists, molecular biologists, epidemiologists, vaccine researchers and economists in the National Advisory Committee in fighting coronavirus in the country.

South Korea's president has put his country on its highest alert for infectious diseases, saying Sunday that officials should take "unprecedented, powerful" steps to fight a viral outbreak.