Dr. Jonathan Chan

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PHOTO: In this undated stock photo, a woman is seen gettin a mammogram. — STOCK PHOTO/Getty Images

3D mammography better at detecting early-stage cancer with fewer false positives, study finds

PHOTO: Republican presidential nominee former President Donald Trump arrives at Harry Reid International Airport to board a plane after a campaign trip, Sept. 14, 2024, in Las Vegas. — Alex Brandon/AP

Trump praises Secret Service response to apparent assassination attempt

PHOTO: Ryan Chian and his family now advocate for clear AED placement in all schools after the 15-year-old experienced a cardiac arrest during basketball tryouts. — Courtesy of Linda Chian

Teen athlete saved after cardiac arrest speaks out: What to know about lifesaving role of CPR, AEDs in schools

PHOTO: Stock image of senior female sitting at table reading the medical report and medicine drug prescription. — Adobe Stock

Millions of seniors can't afford their prescription medications: Study

PHOTO: Biting Mosquito — STOCK IMAGE/Getty Images

'Drain, dress, defend': The simple steps recommended to keep mosquitoes at bay

PHOTO: Diana Pena is shown during an interview with "20/20."

Witness recalls night Instagram model 'Badd Barbie' murdered beloved California doctor

PHOTO: Mosquito biting a person's skin. — STOCK PHOTO/Adobe Stock

10 Massachusetts communities at high risk of mosquito-spread virus 'Triple E'

PHOTO: A COVID-19 at home self-test kit. — Universal Images Group via Getty Images

Free at-home COVID testing program restarting as officials prepare for fall, winter season

PHOTO: Robert F. Kennedy Jr. speaks at the Bitcoin 2024 conference in Nashville, July 26, 2024. — Liam Kennedy/Bloomberg via Getty Images, FILE

RFK Jr. expected to drop out of race by end of week, plans to endorse Trump: Sources

PHOTO: A close up of water beads — Adobe Stock

Water bead-related ER visits among kids rose over 130% between 2021 and 2022: Study

PHOTO: A caregiver and a senior woman holding hands at home. — STOCK PHOTO/Getty Images

More people are dying from dementia, according to new study

What's biological age? How diet impacts aging, according to experts

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