Orthomyxoviridae

Under Orthomyxoviridae, there are Influenza virus types A and B. They are common causes of acute respiratory illnesses. Both virus types may cause epidemics of considerable morbidity and mortality.

• Influenza virus A causes of all flu pandemics and infect humans, other mammals and birds
• Influenza virus B infect humans and seals
• Influenza virus C infects humans and pigs.

Influenza A virus

Influenza B virus

Influenza C virus

Picture extracted: http://www.ioe.ucla.edu/Ctr/research/AvPath/avian_influenza.html
http://www.argene.com/pictures_gallery/index_ang.php?o=300
http://pathmicro.med.sc.edu/mhunt/flu.htm