Yes my mother who is 66 yrs old start taking oxygen at night when she sleeps last Thursday night, when she woke up Friday morning she started feeling little sick. That night she had pains in her lower stomach that has now change just to a achy stomach ache now. She is also having a headache, dizziness, diarrhea, coughing, plus coughing up phlegm, no appetite, and no energy, she has been in the bed sense Monday. She also hasn't ate sense Monday and is hardly drinking much. She did run a little bit of a fever the other morning.