26
Oct
The causal link between air pollution and Covid-19 cases is yet to be established conclusively but long-term exposure will certainly make people more vulnerable to lung infections, warn scientists as the skies over large parts of north India, including Delhi, turn smoky and the air quality deteriorates rapidly.Their concerns come amid several global studies pointing to the possible connection between higher air pollution levels and increased Covid-19 cases and deaths. A study by researchers at Harvard University in the US in September showed that an increase of only one microgram per cubic metre in PM 2.5 is associated with an…