I haven't called to apply for a health certificate for three days.

If you don't receive a phone call within three days after getting the health certificate, it may be the following reasons:

1. It takes some time to review. If the physical examination results are abnormal, you will receive a phone call.

2. The notification could not be sent successfully due to information input error, incorrect telephone number, lost notification, etc.

3. In the process of waiting for the call, it is suggested that you take the initiative to contact the physical examination institution or health bureau to ask about the relevant situation.

The above information is for reference only, and it is recommended to consult relevant departments.