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IMPACT: The research newsletter of Kaiser Permanente Southern California

IMPACT Feb 2026

February 26, 2026

Focus Feature: Why less may be more when it comes to MS treatment

New Kaiser Permanente research shows that extending rituximab dosing to every 12 months is as effective as dosing every 6 months for MS patients. Extended time between doses was shown to maintain control of the disease while reducing other health risks.

R&E News and Features

  • Staying active during pregnancy helps keep postpartum weight off

    An analysis of nearly 60,000 pregnancies showed that people who stayed physically active before and during pregnancy had less postpartum weight retention than those who got little exercise.

  • Wildfire smoke studies reveal differing health risks

    One new Kaiser Permanente study showed that wildfire smoke may be raising mortality risk for older adults, while another showed wildfire smoke may be increasing the risk of autism among children whose mothers were exposed.

  • Study evaluates heart disease risk prediction across Asian ethnicities

    Researchers assessed the PREVENT cardiovascular risk equation’s ability to predict cardiovascular disease risk in Asian, Native Hawaiian, and Other Pacific Islander adults and found its accuracy differed across ethnic subgroups. 

In the News

Five questions...

for Dr. Hui Zhou

Hui Zhou, PhD, MS, a research scientist biostatistician and mother of this year’s Rose Queen, answers questions about her career in science, and how she connects her job, community involvement, and motherhood.