As the days get longer and spring nears, you might expect winter illnesses like the flu and common cold to fade away. However, that’s not always the case. According to the CDC, flu activity often peaks between December and February but can persist through May. The common cold, too, doesn’t stick to just one season—it can strike year-round.
Why Colds and Flu Linger Beyond Winter
It’s a myth that cold weather alone causes illness. In truth, viruses are the culprits. Winter encourages us to stay indoors, where germs spread more easily. Plus, cold and dry air allows viruses to travel and survive more effectively.
No matter the season, protecting your immune system should be a year-round priority—especially if you're a new or expecting mom. Basic steps like handwashing and avoiding close contact with sick individuals are helpful. But you can take things further by eating nutrient-rich foods and adding key supplements like omega-3s to your routine.
The Remarkable Development of Your Baby’s Immune System
Your baby’s immune system undergoes dramatic changes after birth. A groundbreaking study published in the journal Cell described these developments as a “well-choreographed dance,” showing that all babies follow a similar immune response pattern in the first few weeks of life.
Using a new technique to track immune cell development, researchers followed 100 premature and full-term infants and were able to observe how their immune systems adapted to life outside the womb. Future plans include tracking these children over the years to understand links between early immune development and conditions like asthma, allergies, and autoimmune diseases.
Omega-3 and Immune Function: What the Research Says
Omega-3 fatty acids, especially EPA and DHA, are well known for their heart and brain health benefits—but research also suggests a role in immune system support.
Enhancing Immune Response
A 2013 study published in the Journal of Leukocyte Biology found that omega-3s may strengthen the immune system by enhancing the activity of B-cells, a type of white blood cell essential for producing antibodies. These cells have a “memory” and help the body recognize and fight off viruses and bacteria more efficiently.
Omega-3 During Pregnancy: Stronger Immunity for Baby
A landmark 2016 study in the New England Journal of Medicine explored how prenatal omega-3 intake affects babies’ respiratory health. In the study, 736 pregnant women were given either fish oil containing EPA and DHA or a placebo starting at 24 weeks of gestation.
Key Findings:
-
Children whose mothers took omega-3 supplements had a 30% reduced risk of persistent wheezing or asthma.
-
The effect was most pronounced in women who had the lowest levels of EPA and DHA at the start of the study.
-
Supplementation was also linked to fewer lower respiratory tract infections.
DHA Supplementation and Cold Duration
A 2011 study published in Pediatrics further supports the role of DHA during pregnancy. Pregnant women took 400 mg of DHA daily from mid-pregnancy to birth. Afterward, their infants showed:
-
Fewer cold symptoms at 1 month.
-
Reduced duration of cough, phlegm, and wheezing.
-
Less time spent ill at 3 and 6 months.
-
Shorter duration of symptoms like fever, rash, and nasal congestion.
These findings show that DHA can positively influence early immune development and illness resistance.
Why DHA Matters Beyond the Immune System
DHA supplementation during pregnancy is linked not only to immune health but also to:
-
Improved brain and vision development in infants
If you’re pregnant or planning to become pregnant, talk to your healthcare provider about whether omega-3 supplements, particularly those rich in DHA, are right for you.
Final Thoughts: Boost Your Immunity Year-Round
The immune system doesn’t take a break—and neither should your care for it. Whether it’s spring, summer, fall, or winter, supporting your body with essential nutrients like omega-3s can make a lasting difference for both you and your baby.
If you’re wondering how to get more DHA in your diet, check out these helpful tips on incorporating omega-3-rich foods and supplements into your daily routine.
