Covid

My brother Tested positive for Covid 19 last Friday the 18th, my sister saw him on Tuesday 15th as he was in her home. She got tested on Saturday and has tested negative.

She is supposed to fly to me in Texas to meet the baby on Monday.

Since she tested negative - is she safe to fly to us?

Her doctor says yes since she tested negative. But was that enough time for the test to become positive?

I know no one is a doctor here but in having a hard time finding answers and she is being persistent that we are all good and I just don’t know. Picture of my Isabella just for fun 🥰