Deep into the official winter month, the National Capital finally witnesses a piercing cold wave accompanied by some dense fog. While it sure does feel like a breath of fresh air, there's no telling when you might contract infectious viruses and bacteria.

from Times of India https://timesofindia.indiatimes.com/life-style/health-fitness/health-news/beware-of-these-6-symptoms-typical-to-winter-illnesses/photostory/96368758.cms