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Halloween safety tips

Study suggests this hidden virus might spur other conditions in patients

Study could change clinical practice, researchers say

People with familial hypercholesterolemia have higher risk of heart attack before 40, researchers say

One possible factor: how well a patient's pupils respond to light, study suggests

Nearly 1 in 5 survivors taking medication for depression or anxiety years later

One possible factor: how well a patient's pupils respond to light, study suggests

Nearly 1 in 5 survivors taking medication for depression or anxiety years later

Genetic analysis of 40-year-old blood samples shows many North Americans already infected by late 1970s