Do I need a health certificate to travel to Europe in early July?

No, just apply for a tourist visa for the corresponding country. In addition to basic information such as household register and ID card, the materials required for applying for a visa to a European country are also required: employment certificate, asset certificate, etc. But no health certificate is required.

If an elderly person goes to Europe in a group, the travel agency may only require the elderly to undergo a physical examination based on their condition.