Seasonal flu or Influenza

  • The season of flu occurs during the cold half of the year for each hemisphere.
  • Influenza is basically a respiratory infection caused by the Influenza A, B, or C virus.
  • This extremely contagious disease usually spreads through infected droplets suspended in the air which contain the said pathogens.
  • There is no one particular reason that relates this disease becoming an epidemic to the onset of winter months.
  • As a matter of fact, scientists have claimed several reasons why influenza becomes highly pandemic in the cold half of the year.

Some of these are-

  • People spend most time indoors which increases the concentration of pathogens in the air.
  • The amount of UV rays incident on earth during these months decreases which might cause the pathogens to thrive.
  • Cold air tends to dehydrate the nasal passage and in the absence of mucus, we become more susceptible to infections.
  • Viruses thrive in cold temperatures since the rate of decomposition is low in winters.