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Doctor insights on: When Are Colds Contagious

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Contagious (Definition)

One is able to transmit an infection to another by ...Read more


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Are cold sores still contagious when they're gone?

Are cold sores still contagious when they're gone?

Not once the : Skin has fully healed. But they are contagious in all forms of the active lesion. ...Read more

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Are allergies contagious? What are some contagious illnesses?

Are allergies contagious? What are some contagious illnesses?

No: Allergies are your body's unique reactions to allergens that your body recognizes as foreign to your system. If it is an inhaled allergen, it would cause sneezing and watery nasal discharge. If it is an allergen that settled on the skin, it would cause a rash that is generally itchy. It is not contagious but rather genetic so it is common for members of family to react to same antigen. ...Read more

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Are cold sores contagious only when they are open or all the time?

Are cold sores contagious only when they are open or all the time?

NO, unfortunately: They are contagious through all phases until the skin has healed. They are most contagious with an open & oozing sore. ...Read more

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Are sore throats contagious, when your around somebody with one?

Are sore throats contagious, when your around somebody with one?

Yes, they can be: If you have a bacterial infection like strep or a viral infection - they are contagious. ...Read more

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When is pneomonia most contagious?

When is pneomonia most contagious?

Pneumonia: Is seldom transmissible from person to person. Whether this is possible depends upon the organisms causing the infection, the proximity of the people involved, their immune status, whether they smoke, and a variety of other factors. When transmissible it occurs most when the infected person is coughing and producing droplet nuclei of infected material which can be inhaled by others. ...Read more

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Cold flu how many days after fever breaks are you contagious?

Cold flu how many days after fever breaks are you contagious?

Influenza: This is highly dependent on the particular virus with which you were infected. Many people call their infection "flu" when it was not truly influenza. Be more specific and rephrase the question. ...Read more

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Cold sore - how contagious are they?

Quite contagious: Cold sores can be spread by touching cold sores, kissing, sharing glasses, silverwear, toothbrushes or other personal items. ...Read more

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Are all chest infections contagious?

Are all chest infections contagious?

No: Most really not but some are highly contagious such as influenza, the SARS corona virus and pneumonic plague. ...Read more

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Are bacterial infections harmful and are they contagious?

Are bacterial infections harmful and are they contagious?

Yes/yes: We often have bacteria in/on our bodies in harmony.The process is labeled colonization and can be useful. You clot your blood with the help of gut bacteria's effect on vitamins. We usually reserve the term infection to note a harmful process. Bacteria are acquired from the environment, whether that be from persons,animals or objects where they live.The degree of contagiousness varies. ...Read more

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Are you contagious after the nasal flu vaccine?

Are you contagious after the nasal flu vaccine?

LiveAttenuatedVaccin: Nasal Flu Vaccine is a live attenuated vaccine and is not contagious for healthy people.No serious illness has been reported among the contacts, Only contact with severely weakened immune system and in protective envoirenment like after stem cell transplant,on chemotherapy,pre term infants be avoided ...Read more

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How contagious are cold sores if they are open vs closed?

How contagious are cold sores if they are open vs closed?

No: They are most contagious when a scab cracks open and fluid oozes out. But, it is contagious through all phases. It is not contagious once the skin has healed. ...Read more

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How are influenza viruses are transmitted?

How are influenza viruses are transmitted?

Droplets: Influenza viruses are primarily transmitted from one person to another by droplets through talking, sneezing or coughing. ...Read more

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How long is someone contagious for when they have the common cold, flu, or bacterial / viral bronchitis?

Contagious periods: The contagious period differs for each type of infection, even among different viruses! there is a range of values based on different infections ranging from common cold to influenza. These vary from 24 hours to up to 2 weeks! you should ask your physician what infection you have and for how long you will be contagious. Common sense dictates that respiratory viruses travel by cough or sneeze. ...Read more

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Are yawns really contageous?

Empathy: The follow article indicated that contagious yawning is likely associated with the development of the ability to empathize at around age 4 in humans. http://science.howstuffworks.com/life/inside-the-mind/human-brain/question572.htm. ...Read more

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Are cold sores only contagious if they have opened and are leaking fluid?

Are cold sores only contagious if they have opened and are leaking fluid?

NO, they are : Contagious as long as there is a lesion. They are most contagious when split open & oozing. They are not contagious once the skin has fully healed. ...Read more

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How long is a common cold contagious for? And are we contagious even before symptoms appear?

How long is a common cold contagious for? And are we contagious even before symptoms appear?

Common cold: This condition can be caused by a large variety of viruses, the most common is rhinovirus. People are most contagious for the first 2 to 3 days of a cold. A cold is usually not contagious after the first week. Cold symptoms usually start about 2 or 3 days after you came in contact with the virus, although it could take up to a week. Symptoms mostly affect the nose. ...Read more

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