Vitassay SARS-CoV-2+ Flu A+B+RSV+Adeno Resp. is a rapid, immunochromatographic assay for the simultaneous qualitative detection of nucleoprotein antigen of SARS-CoV-2, Influenza type A, Influenza type B, RSV and Adenovirus from nasopharyngeal swabs samples from patients suspected of COVID-19 infection and/or Influenza A and/or Influenza B and/or Respiratory Syncytial Virus (RSV) and/or Adenovirus infection. Simple, non-invasive and highly sensitivity immunoassay to make a presumptive diagnosis of SARS-CoV-2, and/or Influenza type A, influenza type B, and/or RSV and/or Adenovirus infection.