symptoms are usually due to the _____ _____ to the virus, not any particular _____ ______
immuneresponse,virulencefactors
The common cold is caused by one of over 200 different kinds of viruses.
Causative agents:
99 serotypes of rhinoviruses
coronaviruses
adenoviruses
respiratory synctial virus (can be more serious in infants)
Since 2014 there has been another enterovirus, called enterovirus-D68 (EV-D68), that has caused cold-like symptoms in children and that seems to sometimes progress into polio-like symptoms.