The omicron variant of the coronavirus is more deadly and causes more cases of pneumonia than the seasonal flu, several members of the health ministry’s COVID-19 advisory board have said in a provisional assessment that could serve as a warning for people to remain vigilant.

More than two years after COVID-19 began to wreak havoc in Japan and around the world, some experts believe the pandemic's endgame may be in sight, but Wednesday’s finding is a reminder that the coronavirus still poses a threat.

The fatality rate wasn't easy to determine.