Sure, he can be fairly confident his daughter is safe and the regular friends might be as well, but how wide is the group the volleyball group is pulling from.

My wife's sister had her daughter in town from Denver last weekend. They wanted to come over and say hi. We said no thank you. We're sorry we missed you, but we're not taking that risk. We also had to tell her sister that we're going to stay away from her for two weeks after her daughter leaves.