Pfizer’s RSV Vaccine for Older Adults Linked to Guillain-Barré Syndrome, But Drugmaker Says It’s ‘Safe’ Pfizer’s RSV Vaccine for Older Adults Linked to Guillain-Barré Syndrome, But Drugmaker Says It’s ‘Safe’ April 8, 2023 People who receive Pfizer’s respiratory syncytial virus vaccine should be monitored for Guillain-Barré syndrome, according to the authors of a Pfizer-funded study published this week…