Onların bulaşıcı bir hastalığı var.
- They have an infectious disease.
Kabakulak bulaşıcı bir hastalıktır.
- Mumps is an infectious disease.
Louis Pasteur discovered that germs cause most infectious diseases.
- Louis Pasteur hat entdeckt, dass die meisten ansteckenden Krankheiten von Keimen verursacht werden.
Laughter is infectious.
- Lachen ist ansteckend.
Enthusiasm is contagious.
- Enthusiasmus ist ansteckend.
The doctor told us that what Tom has isn't contagious.
- Der Arzt sagte, Tom habe nichts Ansteckendes.