evidence: RSV generally causes mild upper respiratory disease in healthy adults. But for adults 60 or older with certain underlying conditions or other risk factors, RSV can cause serious illness. For example, those with chronic medical conditions such as lung diseases, cardiovascular diseases, neurologic or neuromuscular conditions, kidney disorders, liver disorders, diabetes or moderate or severe immune compromise are good candidates for RSV vaccination, according to the CDC. [...] As with other vaccines, patients can expect some side effects from RSV vaccination. Some of the common side effects include fatigue, fever, headache, muscle or joint pain, nausea and diarrhea. The side effects are typically mild, says the CDC. But there is an important safety concern that requires a close look—a risk of Guillain-Barre syndrome and other inflammatory neurologic events. Guillain-Barre syndrome is a rare autoimmune neurological disorder characterized by ascending weakness and paralysis. The CDC will conduct post-marketing safety surveillance to further inform RSV vaccine recommendations.