The WHO Health Alert service on Messenger from Facebook has been upgraded with artificial intelligence (AI) capabilities that provide Messenger users with a better interactive experience, offer more accurate information, and allow WHO to respond more quickly. The service is part of WHO's continuing efforts to ensure that people have access to reliable and trustworthy sources of information on COVID-19 during the global pandemic. The WHO Health Alert service has already seen record high levels of engagement, indicating a positive demand for the service. Within days of the AI upgrades, over 100 000 persons accessed the service and sent through over 500 000 messages; they also requested data on countries more than 430 000 times, and logged 27 000 sign-ups for daily alerts. Returning users of the service rose to 80%.