In its weekly data published on its website, the UN health agency said the number of deaths since the A(H1N1) virus was uncovered in April rose by 281 from 3,205 a week ago.
The Americas region continued to post the highest death toll, at 2,625.
Asia-Pacific reported 620 fatalities, while Europe recorded at least 140 deaths.
In the Middle East, 61 people succumbed to the virus while in Africa, 40 people died from it.
The WHO observed that flu activity was "above the seasonal baseline" in the United States. France and Japan, meanwhile, have reported that the flu has reached epidemic levels.
Transmission is also rife in the Central and South America and Asia, said the WHO, while in the temperate regions of the Southern Hemisphere, such as Australia and South Africa, flu activity is declining.