Related Articles Does tetanus vaccination contribute to reduced severity of the COVID 19 infection Med Hypotheses 2020 Nov 28 110395 Authors Rickett CD Maschhoff KJ Sukumar SR Abstract We present the hypothesis to the scientific community actively designing clinical trials and recommending public health guidelines to control the pandemic that Tetanus vaccination may be contributing to reduced severity of the COVID 19 infection and urge further research to validate or invalidate the effectiveness of the tetanus toxoid vaccine against COVID 19 This hypothesis was revealed by an explainable artificial intelligence system unleashed on open public biomedical datasets As a foundation for scientific rigor we describe the data and the artificial intelligence system document the provenance and methodology used to derive the hypothesis and also gather potentially relevant data evidence from recent studies We conclude that while correlations may not be reason for causation correlations from multiple sources is more than a serendipitous coincidence that is worthy of further and deeper investigation PMID 33341328 PubMed as supplied by publisher