The spread of respiratory viruses is much more prevalent during the winter months. There is an increasing rise in the cases of cold, flu and allergies and with COVID-19 still amidst us, it is extremely important to take proper precautions.

from Times of India https://timesofindia.indiatimes.com/life-style/health-fitness/health-news/covid-flu-pollution-steps-to-protect-your-lungs-from-viruses-and-air-pollutants/photostory/96080213.cms