https://www.mercurynews.com/2021/07/12/another-warning-about-the-jj-covid-vaccine-what-you-should-know-about-latest-risk/

Federal regulators Monday announced additional warnings for providers and recipients of Johnson & Johnson’s COVID-19 vaccine about an observed increased risk of a rare neurological disorder known as Guillain-Barré Syndrome.

The new reports — while rare and considered still preliminary — are another setback for the single-shot vaccine that was temporarily halted in use in April over concerns about rare instances of potentially deadly blood clots.