12/29/2025
🦠 Cold, Flu, COVID, RSV — What You Should Know This Season
It’s that time of year again: holidays, family gatherings, cold weather (or icy, mixed weather like today!) … and unfortunately, respiratory viruses.
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Here in New Hampshire, influenza, COVID, and RSV are all circulating. You can see real-time local activity here:
👉 NH Public Health Association
https://www.nhpha.org/blog/bdj71yqichervebw1mwstcdemsmgfj
👉 CDC Community Snapshot
https://www.cdc.gov/respiratory-viruses/data/index.html
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A quick personal note
As a doc (Dr. Jon P***k here speaking, by the way), I’ve seen firsthand how serious these infections can become. One case from residency still stays with me: a healthy woman in her early-mid 20s on life support from influenza A. Young, no chronic illness — but critically ill.
A lot of the time, respiratory viruses are mild… until they’re not.
Risk is higher for adults 65+ and for people with heart, lung, kidney disease, diabetes, cancer, or weakened immune systems — but severe illness can happen even in younger, healthy adults.
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So what can you do?
1️⃣ Talk to a professional
Everyone’s health situation is different. Talk with your P*P or healthcare provider about your risks and options. AI tools like ChatGPT and Gemini are impressive — but they’re not a substitute for personalized medical care.
Not yet anyway.
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2️⃣ Vaccinations
Vaccines to consider:
• Flu
• COVID
• RSV (respiratory syncytial virus)
• Pneumococcal (a nasty, bacterial cause of pneumonia)
Vaccines significantly reduce the risk of severe illness, hospitalization, and death. In some cases, they may also reduce transmission — but this is not guaranteed.
Yes, some people can feel “off” or even sick for a day or two after receiving the flu vaccine.
It’s not because you were given the virus. It’s because your immune system is mobilizing — activating immune cells and generating memory so it can recognize and fight the flu in the future.
Unfortunately, influenza viruses evolve rapidly and change from year to year, which is why vaccines are periodically updated.
Vaccines do carry rare but potentially serious risks — talk with your provider about what’s right for you.
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3️⃣ Testing & medications
People often wonder why their P*P or urgent care didn’t run a huge panel of tests to find exactly which virus is responsible.
There is a respiratory viral panel that checks for influenza A & B, COVID, RSV, parainfluenza viruses, human metapneumovirus, rhinovirus/enterovirus, adenovirus, non-COVID coronaviruses — and sometimes more.
For transparency: a full viral panel can cost roughly $800–$1,200.
Here’s why comprehensive testing often isn’t done outpatient:
• Flu → treat with Tamiflu or Xofluza (early)
• COVID → treat with Paxlovid (early)
• Most other viruses → rest, fluids, OTC symptom relief
That’s why targeted flu and COVID testing (pharmacy, P*P, urgent care) is often all that’s needed, with close monitoring for worsening symptoms.
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4️⃣ Nasal sprays? (emerging evidence)
This is not settled science — but it’s interesting:
• One small study suggested azelastine nasal spray may reduce COVID transmission
• Another small study suggested hypertonic saline nasal spray reduced common cold transmission
The proposed mechanism: preventing viral attachment in the nasal passages.
🛶 So basically, the virus is a boat. The cells in the nose are a dock. The nasal spray prevents the mooring line from attaching to the bollard (my attempt at lakeside humor).
More research is needed, but these are low-risk interventions worth discussing.
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5️⃣ Supplements — important cautions
Not everyone wants or needs medications for mild viral infections. I often get asked about vitamins, herbs, and “natural” options. Here’s my take.
“Natural” does NOT mean risk-free.
Supplements are not regulated like prescription medications. Some have been found contaminated with drugs, heavy metals, fungi — even sawdust.
If you use supplements:
✔ Look for third-party testing
✔ Look for GMP-certified manufacturing
❌ Avoid “proprietary blends” with hidden doses (your bu****it detector should be going off)
Treat supplements like medications:
• They can interact with prescriptions
• Be cautious with blood thinners, BP meds, diabetes meds, thyroid meds, or immunosuppressants
• Always discuss supplements if pregnant or breastfeeding
• More is not better — overdosing is possible
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6️⃣ Supplements with some evidence for mild viral illness
(Supportive — not cures)
Vitamin D
• Supports immune function (it does more than help your bones)
• May reduce respiratory infections, especially if deficient
• Best for prevention
Typical dose: 1,000–2,000 IU daily
Zinc lozenges
• May shorten cold duration if started within 24 hours
• Lozenges work better than pills
⚠️ Avoid zinc nasal sprays (risk of permanent smell loss)
Vitamin C
• Regular use may slightly shorten illness
• Limited benefit if started after symptoms begin
Elderberry
• Small studies suggest reduced flu symptom duration
⚠️ Use commercial products only — raw elderberry is toxic
Echinacea
• Mixed evidence
⚠️ Possible allergic reactions; caution in autoimmune disease
Garlic
• Mild immune support
⚠️ Can increase the risk of bleeding at high doses
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🔹 Summary
Respiratory viruses like influenza, COVID, and RSV are common — but they can become severe quickly.
• Vaccination is the most effective way to reduce severe illness and death
• Early testing for flu and COVID can guide antiviral treatment
• Supportive care remains the mainstay for most viral infections
• Supplements may help some people, but quality, dosing, and interactions matter
🚨 Seek urgent medical care for:
• Worsening shortness of breath
• Chest pain
• Confusion
• Persistent high fever
• Inability to keep fluids down
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📌 Disclaimer
This post is for educational purposes only and is not a substitute for personalized medical advice. Supplements, medications, and vaccines may carry risks and interactions. Always consult your healthcare provider before starting new treatments.
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🔹 Want this kind of comprehensive discussion from your doctor?
Call or email to set up a “Meet and Greet” and see if Direct Primary Care is right for you.
📞 603-697-7047
📧 info@windingbrookdpc.com
🌐 https://www.windingbrookdpc.com/
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