No, radiation sickness/poisoning is not contagious. This is because, while the infected person does possess radiation, they're not radioactive. However, the source that gave them the radiation is still radioactive, and, as it has the risk of contaminating others, should be professionally disposed of.
While radiation symptoms can occur from a single, prolonged, exposure, the symptoms of radiation are not contagious.
They are not contagious
False.NO
Yes, you can be contagious with chickenpox before symptoms occur.
Yes, parotitis is highly contagious. This disease can be contagious for up to 4 days after the person starts showing symptoms.
Symptoms are caused by radiation-destroying cells
Symptoms are caused by radiation-destroying cells
FALSE
There does not appear to be a period of time that a cold is least contagious. Scientists believe that a person who has the common cold can be contagious for a few days before their symptoms begin right up until the time when their symptoms subside. This period of time could take up to two weeks. However, the period of time when a cold is most contagious is usually when the symptoms are at their worst, usually 2 to 4 days into the cold.
No. It is a set of neurologic symptoms which exist long after polio, itself, is experienced by the sufferer.
The common cold tends to be most contagious when the symptoms are at their worst (usually day 2 to day 4 of the cold symptoms presenting themselves). That being said, a cold virus can be contagious for 2 to 3 days prior to symptoms presenting themselves until all symptoms have gone away (sometimes up to 2+ wks).
The actual duration will vary depending on the virus that is involved in the illness. In general, for the worst case scenario, you are contagious as soon as a day after you have been exposed to the virus (even before symptoms appear) and two weeks after your symptoms have cleared. In the best case scenario, you are contagious while showing symptoms and at least three days after they have cleared.