Articles
Shine india monthly magazine
Shine india monthly magazine published this article page no 55 influenza is caused by a virus that attacks mainly the upper respiratory tract – the nose throat and bronchi and rarely also the lungs. the genetic makeup of influenza viruses allows for both major and minor genetic changes making them immune to existing vaccines. three times in the last century the influenza viruses have undergone major genetic changes resulting in global pandemics and large tolls in terms of both disease and deaths. the most infamous pandemic was spanish flu which affected large parts of the world population and is thought to have killed at least 40 million people in 1918-1919 shine india monthly magazine subscription.