Sickness Frequency in Daycares

For those of you who have little ones in daycares how frequently do they get sick. My son who is 23 months seems to get sick with something every month. This month it’s Hands Foot and Mouth disease. Of course my 10 months old got it but surprisingly I have it too. I’m really frustrated and I’m on a waitlist for a new daycare. However is this just normal or are some daycares cleaner and more preventative?