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Biologists at Fred Hutchinson Cancer Research Center discovered that a single mutation in a flu virus can give it the power to escape 90% of one person’s antibody immunity, but not another’s.
Flu is known for coming on hard and fast, for example. If you suddenly develop symptoms and it feels like they came out of nowhere, Dr. Russo says it can be a “hint” that you may have the flu.
Influenza, commonly known as the flu, is an infectious disease caused by influenza viruses. Symptoms range from mild to severe and often include fever, runny nose, sore throat, muscle pain, headache, coughing, and fatigue. These symptoms begin one to four (typically two) days after exposure to the virus and last for about two to eight days.
For the most part, symptoms have remained the same. Though there's talk of the variant possibly leading to more severe disease and additional GI symptoms like diarrhea, nothing has been confirmed.
Immunity can be acquired either actively or passively. Immunity is acquired actively when a person is exposed to foreign substances and the immune system responds. Passive immunity is when antibodies are transferred from one host to another. Both actively acquired and passively acquired immunity can be obtained by natural or artificial means.
Adaptive (or acquired) immunity creates an immunological memory leading to an enhanced response to subsequent encounters with that same pathogen. This process of acquired immunity is the basis of vaccination. Dysfunction of the immune system can cause autoimmune diseases, inflammatory diseases and cancer.
When the weather starts to cool, a common question often arises: "Am I sick, or is it just allergies?" Here's what the experts say.
The common cold often shares many of the symptoms associated with COVID-19 or the flu but tends to be much milder. You may have a runny nose or congestion, sneezing, sore throat, cough, slight ...
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