Why can't Apple's mobile phone receive epidemic prevention messages?

Because the option to filter unknown senders is turned on.

The solution is as follows:

1. Open the settings. First find and open the settings on the desktop of Apple's mobile phone.

2. Click the information, and then click the information option in the setting center to enter.

3. Find the sender who filters the unknown, and find the sender who filters the unknown. When the status is turned on, unknown information will be blocked.

Just close it, and finally click the button on the right to close it.