Can no one in the team handle the health certificate?

It is impossible for a team to apply for a health certificate without anyone.

No, you need one person and one certificate. It's better to deal with it in a unified way, which saves time.

I have to go, bring my ID card, and have a physical examination.

You can also apply for a health certificate alone. As long as you meet the requirements of health certificate, you can apply to your department.