Guillain-Barré Syndrome is an uncommon, rare neurological condition in which the immune system mistakenly attacks the body's nervous system causing muscle weakness, numbness, and in extreme cases, paralysis. Campylobacter jejuni (C. jejuni), a bacterium known to cause foodborne illness, is one of the most common infectious agents linked with GBS and also the reason behind the recent outbreak of GBS in Pune, where 111 cases of the diseases have been identified in 3 weeks.Guillain-Barré Syndrome is an uncommon, rare neurological condition in which the immune system mistakenly attacks the body's nervous system causing muscle weakness, numbness, and in extreme cases, paralysis. Campylobacter jejuni (C. jejuni), a bacterium known to cause foodborne illness, is one of the most common infectious agents linked with GBS and also the reason behind the recent outbreak of GBS in Pune, where 111 cases of the diseases have been identified in 3 weeks.