Within minutes, six-year-old Rubjit Thindal went from happily chatting in the back seat of the car to collapsing and dying in her father's arms. "If we had known it was so serious, we would have called 911,'' Kuldip Thindal, Rubjit's distraught mother, said in Punjabi yesterday. "She just had a stomach ache -- she wasn't even crying.'' Rubjit was pronounced dead at hospital barely 24 hours after showing signs of a fever. Later, doctors told her parents she had the H1N1 influenza virus. She is believed to be the youngest person in Canada with the virus to have died.