Half the respondents in a new poll say Hillary Clinton Hillary Diane Rodham ClintonJoe Biden looks to expand election battleground into Trump country Biden leads Trump by 12 points among Catholic voters: poll The Hill's Campaign Report: Biden goes on offense MORE has given the public false information about her health.

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The Morning Consult poll released Wednesday morning found 29 percent say the Democratic presidential nominee has provided accurate information.

Just more than one-third, 37 percent, said Clinton's Republican rival, Donald Trump Donald John TrumpBubba Wallace to be driver of Michael Jordan, Denny Hamlin NASCAR team Graham: GOP will confirm Trump's Supreme Court nominee before the election Southwest Airlines, unions call for six-month extension of government aid MORE, has given false health information to the public.

Pollsters also found that four in 10 Americans describe Clinton's health as below average or very poor.

The Morning Consult poll shows 41 percent describe Clinton's health as below average or very poor, up from 22 percent in August. Additionally, 22 percent describe Clinton's health as above average or excellent, down from 29 percent who said that in August.

Half of voters said Clinton's health will not affect their vote, pollsters found, while a quarter said it will make them less likely to cast their ballots for her.

Clinton left a 9/11 memorial ceremony early Sunday after becoming overheated. A widely circulated video showed the Democratic nominee stumbling into a black van as aides held onto her.

In a statement released Sunday evening, Clinton's doctor disclosed a diagnosis of pneumonia.

The Morning Consult poll was conducted from Sept. 12 and 13 among 1,501 registered voters and has a margin of error of 3 percentage points.

--This report was updated at 12:45 p.m.