Why do many people who are allergic to viruses and other infectious agents get the cold or flu?
The reason for this is due to the way the immune system works, according to Professor David Mancini, an immunologist and researcher at the University of Queensland in Australia.
He says the body’s immune system is highly sensitive to all the types of allergens present in the air around it, including viruses, bacteria and parasites.
“You can get a very strong reaction if you breathe in a mixture of these allergens,” Professor Mancinis said.
“This is not a reaction to the actual virus.
It’s not an allergic reaction, it’s an allergen reaction.”
But the immune response does not go away if the body has to deal with something it doesn’t recognise as an all-ergen.
Professor Mancinos research has shown that the body responds to the allergenic environment by producing antibodies to recognise it as an allergy.
This is because the body can detect all of the allergens that are present, but it cannot recognise them as being foreign.
The immune system responds to allergens, but does not recognise them, by producing an immune response that is very strong, Professor Mancerini said.
“There are very few things you can do that would be as powerful as this,” Professor Stephen Mancino said.
The body has three types of cells: CD4 cells, which are found in the lungs, bronchi and brain, and T cells, found in tissues like the skin and the eyes.
They are the cells that help to fight infection and protect the body against viruses.
When a person has the flu, the body produces a chemical called interferon-gamma which helps to produce the antibodies in the body to recognise allergens.
But this chemical is not released by the immune systems in response to the virus, so the immune reaction remains strong and the person continues to get the virus.
The immune response is what makes it difficult to treat people with influenza if they do get the illness.
If you’re on the flu shot, the flu vaccine can prevent you from getting the flu but the person does not know they are getting the vaccine and the risk of getting the virus increases.
Professor Mancerinos research also shows that the immune responses of people with asthma, allergies and asthma have changed over the years, and so have the levels of antibodies produced in the immune cells of people who have asthma.
So Professor Mancers research has led him to believe that the response to allergen is not the same as that of people living with the condition.
“This makes sense, as we don’t recognise all the allergens that we’re exposed to,” Professor Mancini said of the immune reactions.
In a similar way, people who do not develop an allergy to viruses have a lower level of IgA, an antibody produced in their skin.
Scientists have discovered that when they study people with a particular genetic variation known as HLA-DR3, their immune systems are different to those of people without it.
Researchers are now studying whether this genetic variation is a risk factor for people who develop a severe allergic reaction to viruses.
Professor Stephen Mancerino, a lecturer in immunology at the Australian National University, is the author of The Allergy Virus: The Origin and Evolution of an Allergic Reaction and The Allergens in Your Body: Why Allergies are Allergic.