where does the cold virus live in the body
Common cold The common cold, also known simply as a cold, is a viral infectious disease of the upper respiratory tract that primarily affects the nose.[7] The throat, sinuses, and larynx may also be affected.[5] Signs and symptoms may begin less than two days following exposure.[5] They include coughing, sore throat, runny nose, sneezing, headache, and fever.[2][3] People usually recover in seven to ten days.[2] Some symptoms may last up to three weeks.[6] In those with other health problems, pneumonia may occasionally develop.[2]
Swine influenza The H1N1 form of swine flu is one of the descendants of the strain that caused the 1918 flu pandemic.[64][65] As well as persisting in pigs, the descendants of the 1918 virus have also circulated in humans through the 20th century, contributing to the normal seasonal epidemics of influenza.[65] However, direct transmission from pigs to humans is rare, with only 12 recorded cases in the U.S. since 2005.[66] Nevertheless, the retention of influenza strains in pigs after these strains have disappeared from the human population might make pigs a reservoir where influenza viruses could persist, later emerging to reinfect humans once human immunity to these strains has waned.[67]