Legislation on business travel and restrictions to enter Germany are evolving.
Entrants to Germany do not require proof of vaccination. Instead, an entrant must firstly justify why he is entering Germany and secondly observe the laws of the respective Federal State (Bundesland) in which he will be staying after entering.
Before entering Germany, an entrant must register at https://www.einreiseanmeldung.de and carry confirmation with him upon entry.
In addition, the entrant must be tested no later than 48 hours after his entry and present the test certificate to the competent authority if requested within ten days of entry. Evidence is a medical certificate or the result of a COVID-19 test. Individuals entering from an area with a high risk of a SARS-CoV-2 infection, are required to test before departure. The entrant must present proof of this test when entering Germany or to the travel agent at departure.
After entrance, the person must obey the law of the respective Federal State (Bundesland). This may include quarantine if the person has stayed in a risk area within ten days prior