evidence: The following search terms were used in Pubmed and Web of Science to construct the initial dataset of articles: ((SARS-COV2[All Fields] OR ("COVID-19"[Supplementary Concept] OR "COVID-19"[All Fields] OR "covid19"[All Fields])) AND ("2020/01/01"[PDAT]: "2020/12/31"[PDAT]) NOT ("review"[Publication Type] OR "review literature as topic"[MeSH Terms] OR "review"[All Fields]) AND ("loattrfull text"[sb] AND "humans"[MeSH Terms] AND English[lang])) AND (brain OR cerebrum OR cerebellum OR "nervous system" OR neuron* OR spinal OR brainstem OR olfactory OR nasal OR pharyn* OR trachea OR lung OR airway OR bronch* OR heart OR vascular OR arterial OR vena OR "blood vessel" OR "lymph node" OR "lymph vessel" OR lymphatic OR thymus OR spleen OR "bone marrow" OR tonsils OR blood OR oral OR mouth OR? esophagus OR stomach OR pancreas OR liver OR "gall bladder" OR gut OR intestin* OR salivary OR saliva OR stool OR faeces OR kidney OR urethra OR ureter OR bladder OR kidney OR urine OR testit OR epididym* OR prostate OR penis OR sperm OR semen OR ovari* OR uterus OR vagina* OR placenta* OR tegument OR skin OR muscle* OR bone OR joint OR hypothalamus OR pituitary OR thyroid OR adrenal OR reservoir OR autopsy OR cardiovascular OR immunological OR endocrinal OR