Influenza : Symptoms Transmission and prevention

Influenza : Symptoms Transmission and prevention :- Influenza is an acute respiratory tract infection caused by Influenza virus. Influenza commonly reffered to as the flu is an infectious viral disease caused by RNA virus of the family orth-myxoviridae (the Influenza virus) that affects birds and mammals.

Influenza : Symptoms Transmission and prevention
Influenza : Symptoms Transmission and prevention

Influenza virus are divided into three types :-

  1. Influenza A
  2. Influenza B
  3. Influenza C

Influenza A

  • Influenza A virus are divided inti types based on differences in two viral surface proteins called the hemagglutin (H) and the neuraminidase (N)

Influenza B

  • Influenza types viruses change only by te more gradual process of antigenic drifl.

Influenza C

  • Type C infection usually causes either a very mild respiratory illness or no symptoms at all.

Signs & symptoms

Influenza : Symptoms Transmission and prevention
Influenza : Symptoms Transmission and prevention
  • Fever (100 F – 103 F)
  • Cough
  • Sore throat
  • Runny or stuffy nose
  • Headache
  • Muscles aches
  • Extreme

Mode of Transmission

In Influenza is spread mainly from person to person by droplets infection or droplets nuclei created by sneezing, coughing or talking. The portal of entry of the virus is the respiratory tract.

Prevention

  • Vaccine – The flu shot – an inactivated vaccine (containing killed virus) that is gven a needle usually in the arm.
  • The nasal spray flu vaccine – a vaccine made with life, weakened flu virus that is given as a nasal spray.
  • (Sometime called LAIV for “live attenuated Influenza vaccine”)