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The FDA has issued a new warning for the Johnson & Johnson COVID-19 vaccine due to reports of Guillain Barre syndrome, a rare autoimmune disorder, in some recipients. Despite the low risk, the FDA maintains that the vaccine's benefits outweigh the risks. Additionally, a study from New York University suggests a link between oral health and cognitive function, indicating that tooth loss may increase the risk of cognitive impairment and dementia. The study highlights the importance of oral health and the potential benefits of using dentures.

What new warning has the FDA added regarding the Johnson and Johnson coronavirus vaccine?

What is Guillain Barre syndrome and how is it related to the Johnson and Johnson vaccine?

What did the study from New York University find about tooth loss and cognitive impairment?

How does the risk of cognitive impairment differ between those who use dentures and those who do not?

What importance does the study author emphasize regarding oral health?