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Published: June 26, 2025
Read Time: 2.8 Mins
Total Views: 987
Long-Acting HIV Prevention and the Return of Diphtheria in Europe
Watch on YouTube: https://www.youtube.com/watch?v=M0D0yaeyxf0
Published: June 26, 2025
Author: Editorial Team, reviewed by Dr. Jay Varma
In this episode of Thermometer HQ, Inside Outbreaks, Dr. Jay Varma and Dr. Jon Epstein explore two critical global health topics: a major scientific breakthrough in HIV prevention, and the troubling reemergence of diphtheria in Europe.
🧬 Breakthrough in HIV Prevention: Long-Acting Injectable PrEP
After decades of frustration in the search for an HIV vaccine, new long-acting injectable medications may finally offer a practical, scalable solution to preventing HIV infection. In this episode, Dr. Varma and Dr. Epstein break down the implications of lenacapavir, a drug that may only need to be administered once every six months — and possibly just once a year in the future.
They compare this innovation to earlier versions of Pre-Exposure Prophylaxis (PrEP) like Truvada, which require daily dosing, and cabotegravir, which requires bimonthly injections.
Key points covered include:
- How lenacapavir works and why it’s potentially revolutionary for HIV prevention.
- The public health strategy of turning high-risk individuals into virus-resistant ones.
- Why an HIV vaccine is still critically important, despite this breakthrough.
- How this new approach fits into broader efforts like PEPFAR, and why U.S. funding cuts are threatening global access to HIV treatment.
“Undetectable means untransmissible,” Dr. Varma emphasizes, highlighting how treatment doubles as prevention.
🧫 Diphtheria Resurgence in Europe: A Warning from the Past
Switching gears, the episode turns to a disturbing trend: the resurgence of diphtheria, a bacterial disease that was once nearly eradicated thanks to vaccines. New research from Europe reveals how diphtheria is spreading again — especially among young migrants from conflict zones like Syria and Afghanistan.
Key findings from the recent genomic study:
- Most cases were skin infections, but some were respiratory, which are more dangerous.
- The affected populations had low vaccination coverage due to war, displacement, and lack of infrastructure.
- A portion of the bacterial strains showed antibiotic resistance — making prevention through vaccination even more essential.
Dr. Varma draws a chilling parallel to the post-Soviet diphtheria outbreak in the 1990s, warning that declining vaccine rates in the U.S. could lead to similar disasters.
🔍 Prevention Over Treatment: A Core Public Health Principle
This episode offers a powerful reminder: prevention is more effective and less dangerous than relying on treatment.
Whether it’s controlling HIV with injectable prophylaxis or stopping diphtheria through routine childhood vaccines, the same rule applies:
Don’t wait for disaster — vaccinate, educate, and act early.
🩺 Final Thoughts from Dr. Varma
From cutting-edge HIV interventions to a 100-year-old vaccine-preventable disease making a comeback, this episode reinforces why science-based public health policy is vital. Breakthroughs mean little if they aren’t accessible — and diseases we thought were “gone” can come roaring back when we let our guard down.
