About Vira

Vira is a chatbot who answers your questions about COVID-19 vaccines.

A check mark symbol on top of a shield, on top of a warm orange circle, signify that the chatbot offers trustworthy information.


Gives you access to evidence-based answers pre-vetted by Johns Hopkins vaccine scientists.

A light bulb symbol on top of a warm orange circle shows how the chatbot learns by listening to questions from users.


Learns by listening to your questions and feedback to help scientists respond to emerging questions.

A stopwatch symbol on top of a warm orange circle shows how the COVID-19 vaccine chatbot responds to user questions instantly.

Always On

Responds to your questions in seconds any time and anywhere via mobile & desktop.


Vira is a chatbot developed by the International Vaccine Access Center at the Johns Hopkins Bloomberg School of Public Health with experts from the Bloomberg School's Department of International Health and Johns Hopkins Whiting School of Engineering.

Vira’s knowledge base from Johns Hopkins vaccine scientists was developed with support from the COVID-19 Training Initiative, with funding from Bloomberg Philanthropies. VaxChat is powered by IBM Technology.