[5] O'Brien and colleague Joel Selanikio (from the CDC) discovered the children had been exposed to liquid acetaminophen Afebril and Valodon manufactured by Pharval that was contaminated with almost 25% diethylene glycol (DEG), a poison.

[2] Her scientific and policy work domestically and globally has focused on vaccine preventable illnesses, among both children and adults.

She has worked extensively with American Indian populations and in Africa and south Asia, partnering with local scientists and country program staff to develop rigorous scientific evidence and bring it into the vaccine policy arena, thereby accelerating the use and access to life-saving vaccines for children living in low resource countries and settings.

[10] In this role, she is responsible for leading the overall work and strategy of the Department to advance the vision of reducing the health, social and economic burden of vaccine preventable diseases.

[11] She has worked in close partnerships with GAVI, the Vaccine Alliance, university colleagues, NGOs, and with countries to advance programs and policies on child health.