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This Week in Virology

A US measles death is erased from CDC data, and state reporting is being taken over by the federal government

The CDC refused to count two Pennsylvania measles deaths in the national tally, on the grounds of "insufficient information" — but the CDC itself took part in that investigation. The precedent is more dangerous than the individual case: state reporting has become negotiable.

Public healthMeaslesEbolaCOVID vaccinesCDC
A clinical-update format: the first stretch is a quick pass over outbreak data, and the two densest segments are the measles death controversy in the middle and the COVID vaccine cardiovascular benefit.

The argument · tap a timestamp to hear it

4:06

Florida has local dengue transmission

Griffin says he can now see dengue cases without leaving the country: in the past week alone Florida had 32 locally acquired cases, the cumulative total has passed 70 locally acquired dengue cases, and 14 virus-positive mosquito pools have been detected across 5 counties. In the same segment he notes a CDC health advisory issued that day — since July 2026 rabies-related consultations are up 17% over the same period in 2025, including mass exposure events, against a backdrop of US pet owners becoming hesitant about vaccinating animals against rabies. Put together, these two things show not a one-off pathogen but that the US has abandoned lines of defense against preventable diseases it mastered decades ago.

— Daniel Griffin
6:09

NIH money is being moved to the Department of Defense

Nature reported that NIH is seeking to transfer several hundred million dollars' worth of research programs from the National Institute of Allergy and Infectious Diseases to the Department of Defense (referred to in the piece as the Department of War) biodefense program, and two NIH employees told Nature the two sides had signed a preliminary agreement. The Department of Defense response confirmed a research agreement had been signed, allowing "project-by-project strategic collaboration," and said "any suggestion that this agreement was reached in secret is false" — but the response never mentions the money. Griffin's follow-up is direct: biodefense itself is fine, the Department of Defense has plenty of money, and it does not need to reach into the pockets of an already underfunded NIH.

— Daniel Griffin
9:09

HPV vaccination has not risen in four years, stuck at 77.7%

The MMWR adolescent vaccination coverage survey shows HPV vaccine coverage among 13- to 17-year-olds has not risen since 2021 and has now stalled for a fourth straight year: in 2025 only 77.7% had received at least one dose, and only 63.4% completed the series. By comparison, Tdap and meningococcal vaccines have held at about 90% since 2019, with far smaller geographic variation than HPV. The HPV vaccination gap between rural and urban areas exists at every poverty level, whereas the urban-rural gap for meningococcal vaccine appears only among adolescents below the poverty line. Griffin's comment: this vaccine can 100% prevent cervical cancer, anogenital cancers and head and neck cancers — why aren't we doing it.

— Daniel Griffin
15:15

Congo Ebola: only 15% of new cases come from known contacts

MMWR used a set of "operational indicators" to assess control of the 2026 Bundibugyo Ebola outbreak in the Democratic Republic of the Congo over the 21 days from July 31 to August 21: the average proportion of alerts investigated within 24 hours was 83%, against a target above 90%; each confirmed case identified on average only 10.6 contacts, against a target above 20; only 15% to 20% of newly confirmed cases had previously been identified as known contacts, against a target above 90%, meaning most cases are occurring outside known chains of transmission; and 59% of Ebola deaths occurred outside Ebola treatment centers, when that number should be zero. Griffin's conclusion is that the outbreak is far from controlled, with 6,757 confirmed cases and 3,267 deaths so far.

— Daniel Griffin
17:16

The CDC removed state-reported measles deaths from the tally

On August 25 the Pennsylvania Department of Health announced two measles-related deaths in Lancaster County, the state's first in 35 years; the next day RFK Jr. suggested on X that the deaths might have been fabricated by the governor's staff. Late on Sunday night, August 30, the CDC published its weekly measles update, replacing the two deaths with an asterisk and saying the available information could not determine whether measles caused or contributed to the deaths. According to The Washington Post and CNN, the decision came from new CDC director Erica Schwarz, at RFK Jr.'s direction. Vincent points out the key fact: state and local health departments do the case investigation, apply the case definition and report to the CDC; the CDC has no independent investigative authority and historically only receives and aggregates, checking later. This time the CDC was itself embedded in the Pennsylvania investigation, so the "insufficient information" claim does not hold up.

— Vincent Racaniello
19:18

Nobody routinely screens the dead for measles

A SIDRAP commentary dismantled the "measles was not the direct cause of death" line: clinically there is no admission swab, no routine testing before delivery or surgery, and no laboratory reason to go looking for measles virus in someone without symptoms; CDC guidance for clinicians is to look first at clinical features — fever, cough, rhinitis, conjunctivitis, rash — and only then mention testing. So a positive measles result in a death investigation usually means there was already a clinical or epidemiological reason to test. The piece concedes the probability of an unrelated death coinciding with an unrelated measles infection is not zero, but small enough that a rational person should shift their judgment substantially. In the Pennsylvania case specifically: the mother also became severely ill after another child was infected with measles, delivered about a month early, and the infant was born not breathing and could not be resuscitated, with measles virus detected in lung tissue.

— Vincent Racaniello
22:20

The structure of the death certificate is being used as a shield

Much of the dispute stems from how death certificates are structured, something most people have never had reason to learn. Part I lists the causal chain leading to death, with the top line the immediate cause and the lines below it the conditions that produced it, ending with the underlying cause that started the whole sequence; Part II, per the National Center for Health Statistics handbook, is "other significant conditions contributing to death." So the immediate cause line reads pneumonia, encephalitis, or in this case splenic rupture, while measles appears in Part II — measles caused the splenic rupture, and the splenic rupture killed the child. Treating "the immediate cause was not measles" as evidence that measles was irrelevant mistakes the structure of a form for a medical conclusion.

— Vincent Racaniello
24:20

The real damage is the precedent, not these two cases

Vincent lays out the consequence clearly: if the CDC can refuse to accept a state's statutory report until it is satisfied, then the national count becomes negotiable, and every state's data is subject to federal review under undisclosed standards. Former CDC medical examiner Deb Hury told STAT that states have always reported deaths and the CDC has always counted them. Pennsylvania also disputed the federal account of "what information was actually provided," saying both deaths were reported to the CDC's measles response team, that the state epidemiologist conducted a thorough investigation, and that, per the Pennsylvania health commissioner, the CDC was in fact embedded in that investigation. Griffin adds: whichever team is in power now, someday the other team will be, and the federal government should not be touching the data.

— Vincent Racaniello
32:24

COVID vaccination cut cardiovascular event risk by 80%

The study, published in the European Health Journal, used linked administrative health data on 2,391,456 adults in Victoria, Australia (2019 to 2025), a population-based cohort plus target trial emulation, to look at the association between vaccination around the time of infection and major adverse cardiovascular events (MACE, including stroke, heart failure, myocardial infarction, atrial fibrillation and venous thromboembolism). Vaccination was associated with lower risk of all these events, with an estimated absolute risk reduction of 21% — Griffin specifically corrects the phrasing: a risk reduction of 0.21 means an 80% relative risk reduction. His bottom line: every time you get COVID, without vaccine protection you face the risk of heart attack and stroke, and what the vaccine genuinely and substantially reduces is disease, not just infection.

— Daniel Griffin
35:27

A Medicare nurse told a 60-year-old stroke patient not to get vaccinated

Listener Jill is a retired pediatrician in Nebraska whose 60-year-old husband had a stroke two days after a hip replacement seven years ago. Disabled and on Medicare, he is offered an annual virtual home visit by his Medicare Advantage plan, and this year he took it because it came with a $50 health products credit. The nurse practitioner doing the visit, after asking about fall and depression risks, brought up whether he had gotten the COVID vaccine, and on learning he gets a shot every year told him to stop, on the grounds that it is "associated with cardiomyopathy in older men," vaguely mentioning two enzymes and the need for more research before it can be considered safe. Griffin's reaction is that this is deeply troubling: it amounts to spreading misinformation and discouraging evidence-based prevention, and he suggests Jill contact the nurse's supervising physician. He adds that the early signal appeared in younger men and after the first dose, and has not been seen in this age group.

— Daniel Griffin

In their own words · checked verbatim

Look, first of all, an agreement is fine. Strategic collaboration is fine, but they don't even mention about taking hundreds of millions of dollars from the NIH. The Department of Defense has plenty of money. They don't need to steal from NIH, which is underfunded, right?

Daniel Griffin6:09

In addition more than half so 59% of the Ebola deaths are occurring outside Ebola treatment units. I mean that should be zero.

Daniel Griffin16:15

nobody screens for measles. There's no admission swab, no routine test before a delivery or a surgery. No reason a lab would look for measles virus in someone without signs of it.

Vincent Racaniello19:18

If the CDC can decline a state's notifiable disease report pending its own satisfaction, then national counts become negotiable and every state's data is subject to federal review on unstated criteria. That's the damage and it applies to whoever holds the office next.

Vincent Racaniello24:20

you know, if your team is in control right now, um, at some point the other team is going to be in control. No, no team in the in the federal government should be basically messing with the data, not giving us full disclosure on what's going on.

Vincent Racaniello26:22

I mean, so you know, people say, "Oh, I'm I had COVID. It was no big deal." But every time you get COVID, without that vaccination, you're at risk of a heart attack, a stroke, all these horrible outcomes.

Daniel Griffin33:27

this nurse practitioner is spreading misinformation, discouraging um evidencebased um preventative care. Um yeah, this is not great.

Daniel Griffin37:28

So there is this concern and it seems to be that 9 months or later great good to go good response good protection. Um earlier than that you may run into these other issues where you you may even when you later on get an MMR shot you may not get the the boost and the levels that you would get if you had waited till nine months before you started this series.

Daniel Griffin45:33

Figures

Florida locally acquired dengue cases (single week)324:06
Florida cumulative locally acquired dengue casesMore than 704:06
Mosquito pools testing positive for dengue virus in Florida14, across 5 counties4:06
Year-over-year increase in US rabies-related consultationsUp 17% since July 2026 versus the same period in 20255:09
HPV vaccination coverage among 13-17 year olds (2025)At least one dose 77.7%, full series 63.4%10:09
Cumulative confirmed cases and deaths in the DRC Bundibugyo Ebola outbreak6,757 confirmed cases, 3,267 deaths17:16
US measles case count (Johns Hopkins tracker)3,23125:21
Early antiviral treatment for pediatric influenza and hospitalization riskTreatment within 48 hours of onset, hospitalization risk reduced 81%30:24
COVID vaccination and major adverse cardiovascular event riskAbsolute risk reduction 21%, i.e. 80% relative risk reduction33:27
Adults in Victoria, Australia included in the study2,391,45632:24

Glossary

MACE / major adverse cardiovascular events
A composite endpoint including stroke, heart failure, myocardial infarction, atrial fibrillation and venous thromboembolism.
Bundibugyo virus
A species of Ebolavirus; the 2026 Uganda and Congo outbreaks were caused by it.
notifiable disease report
A statutory report that state and local health departments submit to the CDC after investigating according to the case definition.
target trial emulation
An analytic method that uses observational data to emulate the design of a randomized trial in order to estimate causal effects.
immune amnesia
After measles infection, pre-existing immune memory is wiped out, leaving the person more susceptible to other pathogens for years afterward.

How to listen

Who it's for

Practitioners watching the direction of US public health policy, researchers in vaccines and infectious disease, and clinical and policy readers who need to judge whether federal data can be trusted.

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The opening chit-chat about iPhones and recording gear, and the travel vaccine scheduling in the listener letters at the end.