It notes that still only 81 per cent of the world’s population would have access to safe drinking water at home, leaving 1.6 billion without; just 67 per cent would have safe sanitation services, leaving 2.8 billion in the lurch; and only 78 per cent would have basic handwashing facilities, leaving 1.9 billion adrift.

For the first time, the report also presented emerging national data on menstrual health.

In many countries, it showed a significant proportion of women and girls are unable to meet their menstrual health needs.

The variant, first detected in India in December last year, has spread to about 100 countries and the World Health Organisation warned recently that it could soon become the dominant form of the virus. It is also driving a spike in cases in Japan, casting a pall over this month’s Olympic Games.