What can I do if someone refuses to wear PPE for cultural and/or religious observance reasons?

Again, the primary point must be that an open dialogue is held with that individual to understand their concerns and to properly consider the impact that not wearing PPE will have on their abilities to undertake their duties. Consideration must be given as to whether there are any parts of their duties that they can undertake and whether they can remain in their role. Engage with the individual to ensure that you understand their point of view. What other duties can they do if they cannot do fulfil all the duties of their role?