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Research – Surveillance

Understanding emerging and existing health threats begins with good data. PHI leads efforts in collecting, analyzing and interpreting public health data to better track and predict disease and injury across populations. Public health surveillance ensures that researchers, programs, and policymakers have access to the most up-to-date knowledge, critical to improving population health. PHI programs have led and supported surveillance efforts in tobacco usage and related health impacts, workplace disease and injury, chronic diseases such as cancer and asthma, West Nile Virus and other communicable diseases, as well as other public health issues.

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New PHI Study on Breakthrough Infection Shows Steep Vaccine Efficacy Decline Over Six Months

A PHI study in the journal Science analyzed COVID infection by vaccination status among 780,225 Veterans. Researchers found that protection against any COVID-19 infection declined for all vaccine types, with overall vaccine protection declining from 87.9% in February to 48.1% by October 2021.

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