Guichet: hay fever, more and more pollen allergies

Pollen has been measured in Switzerland for over 50 years. The first sensors were installed in Basel in 1969. A pioneering act. Switzerland was one of the first countries in the world to install these devices. Since then, we've been watching pollen dispersals and their consequences like milk on fire. The first hazel pollens were reported as early as last January. And the worst is yet to come between now and April, May and June.