
01
Heartbeats power a battery-free pacemaker designed to last a lifetime
The gist: Researchers developed a heartbeat-powered pacemaker that could work for a patient's entire life without battery replacements.
Big picturePacemaker batteries eventually run out, forcing patients to undergo procedures to replace the device. A long-lasting power source could make leadless pacemakers safer and more practical, especially for younger patients who might otherwise need several replacements.
Explain like I'm 5The device uses the heart's own movement like a tiny hand crank. Each heartbeat makes small charged parts move together and apart, creating electricity for the pacemaker.
Trusted source
Medical Xpress ↗

02
What to know about Dr. Heidi Overton, Trump's pick to lead the FDA
The gist: President Trump has nominated Dr. Heidi Overton to lead the FDA, but her views on vaccines and abortion drugs are likely to draw scrutiny.
Big pictureThe FDA oversees products that affect millions of people, so its leader must balance political demands with advice from career scientists and public-health experts. Overton's past positions could shape debates over vaccines, medication abortion and other health policies.
Explain like I'm 5The FDA is like a giant safety referee for medicines, food and many other products. Overton wants the job, but the Senate must decide whether she is ready to be the referee.
Trusted source
NPR Health ↗

03
Childhood vaccine exemptions for personal or religious reasons hit new record, CDC finds
The gist: U.S. kindergarten vaccine exemptions reached 4.2% in 2025-26, while measles cases climbed to 2,566 in 2026.
Big pictureThe rise is part of a longer trend of families resisting school vaccine requirements since the Covid pandemic. Lower vaccination rates put progress against measles at risk, including the United States’ measles-free status achieved in 2000.
Explain like I'm 5Vaccines are like umbrellas that help protect a whole group from getting sick. When more children go without them, illnesses can spread more easily at school and in the community.
Trusted source
NBC News Health ↗

04
Scientists have designed a functioning virus from scratch using AI. What you need to know
The gist: Researchers used AI to design 16 working bacteriophages from scratch, showing that AI can now help create functioning genetic systems—not just analyze DNA.
Big pictureThis is an early demonstration of generative biology, where AI helps design new biological systems instead of merely studying existing ones. It could eventually support phage treatments for antibiotic-resistant infections, but these lab-made viruses are still far from being medicines.
Explain like I'm 5AI studied lots of virus instructions and suggested new ones, like building new sentences from words it has seen. Scientists made those instructions into tiny bacteria-infecting viruses, but they do not infect people.
Trusted source
Medical Xpress ↗

05
Fast-spreading malaria parasite mutations in Uganda may weaken Africa's most widely used malaria therapy
The gist: Researchers found rapidly spreading parasite mutations in Uganda linked to lower sensitivity to artemether-lumefantrine, Africa’s main malaria treatment.
Big pictureIf these parasites make treatment less reliable, malaria could become harder to control and cause more deaths, especially in sub-Saharan Africa. Tracking the mutations can help health officials spot resistance and guide the search for new medicines.
Explain like I'm 5Some malaria parasites have changed in ways that help them survive the medicines meant to kill them. It is like weeds becoming harder to remove after the same weedkiller is used again and again.
Trusted source
Medical Xpress ↗