Dr. Hans Kluge said age is not the only risk factor for getting a severe case of the virus that has put billions under lockdown and upended the world economy.

“The very notion that COVID-19 only affects older people is factually wrong,” he said at an online news conference in Copenhagen. “Young people are not invincible.”

Those comments echoed similar statements from WHO Director-General Tedros Adhanom Ghebreyesus.

The U.N. health agency says 10% to 15% of people under 50 with the disease have moderate or severe cases.