From the main train station (Hauptbahnhof)

Take subway/U-Bahn line U2 headed for Feldmoching until the station Scheidplatz (a 7 minute ride). At the Scheidplatz station, take the exit for Bummstrasse. At the end of Bummstrasse turn left onto Kraepelinstrasse. Affectis is located within the Max Planck Institute of Psychiatry on Kraepelinstrasse 2.

From the centre of Munich (Marienplatz)

At Marienplatz, take subway/U-Bahn line U3 headed for
 

Olympiazentrum until the station Scheidplatz (a 9 minute ride). At the Scheidplatz station, take the exit for Bummstrasse. At the end of Bummstrasse turn left onto Kraepelinstrasse. Affectis is located within the Max Planck Institute of Psychiatry on Kraepelinstrasse 2.

From the airport

From the Munich airport take the regional train line (S-Bahn) S8 or S1 to the main train station (Hauptbahnhof) and then transfer to the subway/U-Bahn line U2 headed for Feldmoching. Follow the directions indicated above.
Alternatively, a taxi trip from the airport to Affectis takes less than 30 minutes.