“As of Wednesday, 11 March all employees working at [site] and [site] will be divided into two groups. The groups will work in alternation one week from home, and one week on site. This measure is put in place until further notice. The groups have been defined by your leadership team and for simplicity there is “a Blue and a Green group”. By Tuesday, 10 March, we ask you to put the respective color sticker on your badge in order to be allowed to enter the building.”