24-Hour Crisis Hotline: (877)SAFEGBC or (877)723-3422 Mental Health & Substance Abuse Issues

6502 Nursery Drive, Suite 100
Victoria, TX 77904
(361)575-0611
(800)421-8825
Fax: (361)578-5500

Medical Disorders
Resources
Basic InformationLookupsLatest News
AHA News: Understanding the Basics of 'Herd Immunity'Multiple Measures of Social Distancing Required to Slow Coronavirus: StudyCough, Fever, Fatigue? Head to CDC's Online Coronavirus Symptom CheckerThree Countries Have Kept Coronavirus in Check; Here's How They Did ItTrial Finds Acupuncture May Help Prevent MigrainesSevere COVID-19 Might Injure the HeartWhy Are Teens, Millennials Ignoring Coronavirus Warnings?An Expert's Guide to Fact-Checking Coronavirus Info OnlineLivestock, Poultry Safe From Coronavirus: ExpertWuhan Study Shows How Social Distancing Is Saving LivesU.S. Hospital Beds Were Already Maxed Out Before Coronavirus PandemicFDA Warns of Defective EpiPen DangersPoll Finds High Anxiety in the Time of CoronavirusCould Robots Be Deployed to Front Line in Fighting COVID-19?COVID-19 May Force Some Cancer Patients to Delay TreatmentWhat People With Parkinson's Need to Know About COVID-19How to Weather Social Isolation During Coronavirus PandemicCOVID-19 Infection Likely Worse for Vapers, SmokersWhen Arteries Narrow, Chest Pain Can Come Earlier for Women Than MenLoss of Sense of Smell Could Be Early Sign of Coronavirus InfectionMany Drugs Already Approved by FDA May Have Promise Against COVID-19The Other Side of COVID-19: Milder Cases, Healthy RecoveryAs Coronavirus Myths Multiply, Experts Sort Fact From FictionA Third of Americans Ordered to Stay at Home; Summer Olympics Postponed for One YearWeight-Loss Surgery May Cut Risk of Heart Attack, StrokeFDA Warns Americans to Beware of Fake COVID-19 Test KitsTaking Steroids for Rheumatoid Arthritis, IBD? Your Odds for Hypertension May RiseWhat Does a Self-Quarantine Look Like?National Guard Activated in 3 States as U.S. Coronavirus Cases Top 34,000U.S. Coronavirus Cases Pass 26,000, With 1 in 4 Americans Under 'Shelter-in-Place' OrdersRaking Your Leaves to the Edge of Your Yard an Invitation to TicksNew Drug Helps Shrink Inoperable Tumors in KidsCoronavirus Crisis Should Put Elective Surgeries on Hold, Doctors' Group SaysAlmost Half of Coronavirus Patients Have Digestive SymptomsNearly 40% of Hospitalizations in U.S. COVID-19 Cases Involve Adults Under 55Healthy Living at Home to Ward Off CoronavirusWhat You Need to Know About Coronavirus If You Have AsthmaStudy Suggests COVID-19 Might Follow Seasonal PatternTrump Signs Massive Relief Package Into Law as U.S. Coronavirus Cases Reach 10,000AHA News: A Look at Allergies and Heart Health, With Tips to Endure Pollen Season Amid Coronavirus FearsNew Coronavirus Wasn't Made in a Lab, Genomic Study ShowsWho's Most at Risk From Coronavirus?The Most Effective Ways to Kill Coronavirus in Your HomeCoronavirus Cases Hit All 50 States, as U.S. Death Toll Tops 100AHA News: Working Out While Staying Safe During the Coronavirus OutbreakMedical Groups Say Heart Meds Don't Worsen COVID-19 SymptomsBelly Fat Can Lead to a Sudden Attack of Pancreatitis: StudyWith New Boost From Medicare, 'Telemedicine' Steps Up to Fight CoronavirusAnother Study Finds COVID-19 Typically Mild for KidsKeeping Coronavirus Anxiety at Bay
Questions and AnswersLinks
Related Topics

Diabetes

Were You Born in an H1N1 Flu Year or an H3N2? It Matters

HealthDay News
by -- Kayla McKiski
Updated: Feb 11th 2020

new article illustration

TUESDAY, Feb. 11, 2020 (HealthDay News) -- The first type of influenza virus you're exposed to may set your lifetime ability to fight the flu.

Researchers with McMaster University and University of Montreal found that being born in an H1N1 year or an H3N2 year matters. Following a phenomenon known as antigenic imprinting, the study revealed that early exposure to one of these two flu strains permanently affects your immunity.

Knowing who is at a higher risk each year could help tailor pandemic and epidemic planning, the researchers say.

"People's prior immunity to viruses like flu, or even coronavirus, can have a tremendous impact on their risk of becoming ill during subsequent epidemics and pandemics," said study co-author Matthew Miller, an associate professor at McMaster Immunology Research Center.

"Understanding how their prior immunity either leaves them protected or susceptible is really important for helping us to identify the populations who are most at risk during seasonal epidemics and new outbreaks," continued Miller.

Researchers analyzed data from the 2018-2019 flu season. Unlike typical flu seasons where one flu strains dominates, both strains of influenza A dominated at different times.

"We already knew from our previous studies that susceptibility to specific influenza subtypes could be associated with year of birth," said lead author Alain Gagnon, a professor of demography at University of Montreal.

"This new study goes much further in support of antigenic imprinting," Gagnon added. "Instead of just showing how specific age patterns are associated with one subtype or the other during a single influenza season, we took advantage of a unique 'natural experiment' to show how the change in subtype dominance during one season appears to lead, practically in real time, to a change in susceptibility by age."

In the United States, flu has led to between 140,000 and 810,000 hospitalizations and between 12,000 and 61,000 deaths annually since 2010, the U.S. Centers for Disease Control and Prevention estimates.

The study was published recently in the journal Clinical Infectious Diseases.

More information

The U.S. Centers for Disease Control and Prevention has more on the flu.