i know a guy who got it who said it was exhausting to walk from the bedroom to the bathroom
he thought he caught it at disneyland. his wife and kids didn't catch it or were symptomless but he was flat on his back for a week
my ex-gf has a friend, a marathon runner and workout junkie, who caught it in new york and she can't walk up two flights of stairs two years later without stopping to catch her breath
so there is definitely a blood and lung, a cardio aspect to this bat flu that is hit or miss and woe to the one percent who take the hit