My SIL who works as triage in a covid clinic at a public hospital was describing the discomforts that come with this. Getting dehydrated. Trying to stop people handing their forms back directly. People coming too close. Not being able to go to the bathroom as often as usual. Trying to see the clock to write down the time yet vision blurred from ageing eyes trying to focus through the masks, at a distant clock, not touching anything and so on. She developed a rash on her face from the continued mask usage. Trying to safely get the spoiled gear off. Just to get a drink.And with nurses etc it is not just the breathing. My daughter finds one very difficult aspect is being able to drink when one would like to and regularly. The average person can just take a sip pretty much whenever they like. When on duty she cannot drink except when on break, and never when in a ward or patient areas etc. Plus even breaks are an issue as she has to act as if everyone is CV positive including all co-workers. So she spends much of her shift time feeling thirsty.