Jammu, April 13 -- The resurgence of whooping cough or pertussis in multiple countries has caused grave concern amongst health experts. Once considered rare, this bacterial infection is showing a surge in cases across China, the US, UK and others parts of Asia and Europe.

As per the latest reports, China has seen over 32,000 cases and 13 deaths so far this year - an alarming increase compared to last year. Other nations are also reporting higher numbers of cases.

So what exactly is whooping cough and how can one identify it early? Here are some key points about this illness:

A respiratory infection: Caused by Bordetella pertussis bacteria, it usually affects the respiratory system. The infection spreads through airborne droplets when a...