Weekly Pulse Digest #14 — December 28, 2025

Published · Researched 2026-09-22

Week of December 22–28, 2025 · Good Signal

The week in one paragraph. KJ Muldoon Jr. is walking. Born in Philadelphia in August 2024 with severe neonatal CPS1 deficiency — a urea-cycle disorder affecting roughly one in a million newborns and fatal for about half of them — his only long-term option was a liver transplant. Instead, doctors at Children's Hospital of Philadelphia and Penn Medicine built a personalized CRISPR base editor for his exact mutation in about six months, secured FDA clearance, and gave him three infusions between February and April 2025; the case was published in the New England Journal of Medicine that May. On the one-year mark this February, CHOP reported he is walking and talking, has had no serious side effects, tolerates more dietary protein, needs less nitrogen-scavenging medication, and holds steadier ammonia control during childhood illnesses. He made Nature's 10 in 2025, his doctors made the TIME 100 in April, and in July ARPA-H put $160 million behind seven teams building the THRIVE platform to make one-off treatments like his repeatable. Keep CHOP's own frame: this isn't a cure, and he'll be monitored for life. But a baby who was supposed to die or lose his liver is eating protein and hitting milestones — because medicine was built for exactly one person, and it worked.

Rising.

Bespoke medicine, scaling. KJ's case is the first proof that an ultra-rare genetic disease can be treated with a therapy designed for one mutation — and the $160M federal THRIVE program now exists precisely to turn that proof into a platform.
The HIV remission file keeps growing. A New York woman with HIV-1 stayed in remission with no viral rebound for at least 18 months after stopping antiretroviral therapy, following a CCR5-delta32/delta32 haplo-cord stem-cell transplant performed for concurrent leukemia, per a Cell paper from March 2023. No detectable HIV-1 DNA or RNA. She was the first mixed-race woman documented in remission, in a field whose cure cases have been overwhelmingly male and white. Read it straight: a high-risk leukemia treatment, not a scalable HIV therapy.
Century comebacks, compounding. A condor pair in the Yurok Tribe's restoration program began tending what researchers believe is the North Coast's first wild condor egg in over a century — the last local sighting before reintroduction was in 1892 — while the free-flying flock reached 31 birds by September 2026. And Manas National Park in Assam has crossed 50 greater one-horned rhinos, after the species was locally wiped out in the 1990s and early 2000s; Indian Rhino Vision 2020 translocated 18 rhinos between 2008 and 2012, and wild births did the rest.

Falling.

The incurable-and-fatal baseline. CPS1 deficiency was fatal for roughly half of affected infants; HIV remission cases were overwhelmingly male and white. Both framings took a hit this week.
The cynicism about strangers. On May 19, 2026, a young man in Franklin, Kentucky found Stephanie Austin Jenkins's lost cardholder near the river, carried it to her home with the $30 inside intact, and left with a blessing and a good day. The cardholder was something she'd kept from going through her late mother's things — sentimental, irreplaceable. Her Facebook post with the doorbell footage went wide, and ViralHog picked it up. One honest stranger, every dollar accounted for.

Quiet signals (early, still watching).

Whether the Yurok condor egg hatched or fledged is not confirmed — and the scientists themselves cautioned that first-time pairs often fail. Still watching; the nesting milestone stands regardless.
Manas's exact headcount and the date of the underlying official count aren't published in the sources reviewed. Still watching.
The New York patient's social layer is thin: targeted searches didn't surface direct posts, and the coverage sits in science media rather than viral conversation. Early.

Scoreboard. N/A — editions are being written out of sequence, so there are no prior calls to grade.

One line to close. Medicine is getting personal, and extinct is getting temporary — good week to be a baby or a bird.