So my best friend was talking to a neighbor from a diff building and she said her brother and niece…

So my best friend was talking to a neighbor from a diff building and she said her brother and niece got covid... my best friend said she was standing a good distance away but noticed she was coughing. She alerted the manager but the said neighbor denies she has it... is it ok or am I overreacting to tell her we can't come in contact for awhile?

Better safe than sorry.