Lick a rancid strangers face on a public bus
Colds
It's difficult to produce immunity to a common cold because the common cold is not one virus - it is over 700 viruses at last count. Rarely are more than 200 local to any particular area, but that is still, in effect, 200 different colds you can catch. Children tend to get the most colds, as all colds viruses are "new" to them. The amount of colds a person gets as they get older tends to decline, for that same reason - they've already had most of the indigenous colds viruses.
-What are the symptons? -What can you do to get rid of them?
Cold sores are common; 80% of us are infected with the virus.
It is a discrete variable, as number of colds experienced by individuals would be one time, two times or so on. So, it is a finite category proving it a discrete variable.
rhinovirus and coronaviruses
There is no vaccine effective against colds, and infection does not prevent one from getting colds.
Strains of Rhinoviruses are the frequent causes of the common cold. Colds are usually caused by the rhinovirus (up to 40% of colds), or Coronaviruses (about 20%), but there are more than 200 viruses that can cause the common cold.
Bacteria do not cause the common cold. It is caused by a virus.
(study island) AIDs and Common colds
No. It is a virus. There are 200 viruses that cause "colds".
Head colds.