Now is the time to call for her to explain her health problems.
Now is the time to call for her to have a press conference.
Now is the time to criticize her for not explaining her health problems.
Now is the time to criticize her for not have a press conference, “Mrs Clinton why are you dodging the press? Is is because of your health issues?” etc.
Pressure her into responding. The longer she doesn’t respond the worse she looks.