The University of Hong Kong team studied indoor air quality as it was one of the factors aiding the spread of Covid-19 during the pandemic.
While effective, vaccination has not completely controlled the spread of the virus, with the vast majority of transmission now thought to occur indoors in poorly ventilated spaces.
Although two years have passed since it was officially recognised that airborne transmission spreads the virus, and some efforts have been made, there have been no significant improvements in building ventilation, the study found.
“In the absence of a worldwide effort to improve building ventilation, it is likely that poorly ventilated buildings will remain common, meaning that airborne transmission of SARS-CoV-2 will continue. Moreover, if another novel and highly contagious respiratory virus emerges in the future, another pandemic is likely to occur,” said Yuguo Li, professor at the University of Hong Kong.
The researchers note that there...