Long Covid Newsletter
Issue #11November 17, 20257 studies

Men and women experience long COVID differently—immune and hormonal clues may reveal why

Men and women experience long COVID differently—immune and hormonal clues may reveal why

Monday, November 17th Long Covid Newsletter Issue #11

Four years into the pandemic, researchers are finally getting clearer answers about who gets long COVID, why it affects men and women differently, and what actually helps patients recover.

🧬 Women with long COVID show dramatically different immune profiles than men

  • Female long COVID patients with chronic fatigue showed a shift toward producing more immune cells, had fewer protective regulatory T cells, and displayed stronger inflammatory responses compared to male patients

  • Blood analysis revealed women had elevated markers of gut barrier dysfunction and disrupted red blood cell production, potentially explaining severe fatigue symptoms

  • Hormonal analysis showed reduced testosterone in women and reduced estradiol in men, while brain tissue analysis revealed neuroinflammatory signatures specifically in female patients that may explain cognitive symptoms

Why this matters: This suggests long COVID may require different treatment approaches for men and women, potentially including hormone replacement therapy for female patients.

🥈 Top 2% journal 🔗 Cell Reports Medicine 🗓️ Nov 8

Key Findings

💪 Resistance exercise significantly improves long COVID symptoms

In a randomized trial of 233 adults with long COVID, those who did personalized resistance exercises for 3 months walked an average of 83 meters farther on fitness tests compared to 47 meters in the control group. The exercise group also showed meaningful improvements in quality of life, anxiety, depression, and grip strength. Participants exercised about 5 days per week with 71% adherence to the program.

💡 This provides the first solid evidence that a specific type of exercise can meaningfully improve long COVID symptoms (though 
🥈 Top 2% journal 🔗 JAMA Network Open 🗓️ Nov 10

💉 Three vaccine doses before infection cut long COVID risk by 26%

A 2-year study of 4,809 people in Israel found that receiving at least three COVID vaccines before getting infected reduced the likelihood of long COVID symptoms by 34% compared to being unvaccinated. The protective effect remained stable over the full two years. However, getting vaccinated after infection showed no benefit for long COVID symptoms or quality of life.

💡 Timing matters more than total doses - pre-infection vaccination provides lasting protection that post-infection shots can't match.
🥉 Top 5% journal 🔗 Communications Medicine 🗓️ Nov 7

👁️ Unvaccinated long COVID patients face doubled risk of eye inflammation

Analysis of over 127 million patient records showed unvaccinated people with long COVID had twice the risk of developing new-onset uveitis (eye inflammation) at 1 year and 60% higher risk at 2 years compared to unvaccinated people without long COVID. The highest risk was for anterior uveitis affecting the front of the eye. Vaccinated individuals with long COVID showed no increased eye inflammation risk.

💡 Vaccination may protect against long-term complications beyond just preventing severe COVID.

🧠 Three cognitive interventions fail to help long COVID brain fog

A 5-arm trial of 328 people with long COVID cognitive symptoms found that computerized brain training, cognitive-behavioral rehabilitation, and brain stimulation techniques showed no benefits over placebo treatments after 10 weeks. None of the active interventions improved self-reported cognitive function or performance on neuropsychological tests, though all groups showed some natural improvement over time.

💡 Current cognitive rehabilitation approaches may not be effective for long COVID brain fog, highlighting the need for different treatment strategies.
🥇 Top 1% journal 🔗 JAMA Neurology 🗓️ Nov 10

🏥 Digital health app reaches 7,679 long COVID patients across 33 UK clinics

Researchers developed a smartphone app providing rehabilitation support and two-way messaging between long COVID patients and clinicians. Originally aiming for 1,000 users, the app attracted 7,679 patients (78.5% of those invited) across 33 NHS clinics. The study found long COVID can be as debilitating as stage IV lung cancer in terms of fatigue and quality of life.

💡 Digital health tools can scale to meet massive unmet demand for long COVID care when traditional healthcare systems are overwhelmed.
Top 30% journal 🔗 Health and Social Care Delivery Research 🗓️ Nov 10

🔬 Long COVID symptoms persist up to 4 years in Indian patients

A study of 104 long COVID patients in Western India found 79.8% still experienced fatigue as the most persistent symptom, followed by cough and anxiety, with some patients tracked up to 4 years post-infection. Patients who had severe acute COVID, used mechanical ventilation, or received Remdesivir had higher odds of developing long COVID. Sedentary lifestyles were more common in long COVID patients (17.3%) versus recovered patients (6.0%).

💡 Long COVID appears to be a truly chronic condition for many patients, not just a temporary post-viral syndrome.
Top 20% journal 🔗 Journal of Infection and Public Health 🗓️ Nov 6

Implications

These findings paint a clearer picture of long COVID as a complex, chronic condition that affects men and women differently and may require personalized treatment approaches. While some interventions like resistance exercise show promise, others like cognitive training have failed, suggesting researchers need to think beyond traditional rehabilitation methods.

Studies in this issue

Primary sources used for this newsletter.

  1. Sex-specific immune, hormone, and gene activity differences in long COVID patients with chronic fatigue syndrome
    main storyCell reports. Medicine2025-11-08PMID 41205594
  2. Resistance Exercise Therapy After COVID-19 Infection
    key findingJAMA network open2025-11-10PMID 41213124
  3. Long COVID and the risk of developing new eye inflammation: a large database study
    key findingJournal of ophthalmic inflammation and infection2025-11-04PMID 41186895
  4. Creating and using a digital health tool in regular care for long COVID patients
    key findingHealth and social care delivery research2025-11-10PMID 41212631
  5. Best timing of the Pfizer COVID-19 vaccine to reduce long COVID and related quality of life loss
    key findingCommunications medicine2025-11-07PMID 41204001
  6. Long COVID symptoms lasting up to four years in patients from Western India
    key findingJournal of infection and public health2025-11-06PMID 41197399
  7. Testing Treatments for Thinking Problems in Long COVID
    key findingJAMA neurology2025-11-10PMID 41212544

Continue reading

All Long Covid issues