Is it true that the community sent a message to let the children get vaccinated and then sent a text message to unsubscribe?

Really. It is normal for communities or medical institutions to remind residents or patients to get vaccinated or have health checks by SMS or other means. If you receive such a short message, you can confirm the authenticity of the information, for example, confirm whether the community or medical institutions really exist, and contact the relevant medical institutions through official website or telephone.