http://goaskalice.columbia.edu/answered-questions/when-are-colds-contagious
colds are most contagious two to four days after original exposure (whether or not symptoms have developed), when there is plenty of the virus present in nasal secretions.
http://goaskalice.columbia.edu/answered-questions/when-are-colds-contagious
colds are most contagious two to four days after original exposure (whether or not symptoms have developed), when there is plenty of the virus present in nasal secretions.