The coronavirus pandemic is "far from over" and is still disrupting normal health services, especially life-saving immunization for children in the poorest countries, the head of the World Health Organization said on Monday.

The U.N. agency is concerned about rising numbers of cases and deaths in Africa, Eastern Europe, Latin America and some Asian countries, even as the numbers flatten or decline in some wealthier nations.

"We have a long road ahead of us and a lot of work to do," WHO Director-General Tedros Adhanom Ghebreyesus told a virtual news conference in Geneva, adding that a second wave of infections could be prevented with the right actions.