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Case Studies

Short Codes in Public Health Campaigns

When the vaccination effort started, too many shots were going to waste due to irregular supply and canceled appointments. Dr. B solved this problem by connecting people who want vaccines with shots near them.

Woman doing online banking on smartphone short codes program


Dr. B connected excess COVID-19 vaccines with people who wanted shots. Short codes enabled messaging that scaled up quickly to a broad audience, including underserved populations.


In a situation where time, trust and access are critical, trusted short codes are helping Dr. B connect life-saving vaccines to people who need them--no smartphone required. Thorough, familiar text messages notify participants of vaccine availability and remind them of appointments—an important task given that healthcare appointments can have a 10%-20% no-show rate.


After providing brief vaccine eligibility data and opting in online, participants receive all future communications by text message, including availability notifications and appointment reminders.


29 states in four months


Twillio, TrailRunner International

Use Cases

Public Safety

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