Viral Antigens Market Size and Forecast (2021–2031), Global and Regional Share, Trend, and Growth Opportunity Analysis Report Coverage: By Component [Influenza Viral Antigens, Coronavirus Antigens, Zika Virus Antigens, Ebola Virus Antigens, Dengue Virus Antigens, Herpes Simplex Virus (HSV) Viral Antigens, Rotavirus Viral Antigens, Hepatitis A-E Virus Antigens, Measles Virus Antigens, Mumps/Parotitis Virus Antigens, and Others], Technique [ELISA, Immunoassay, Hemagglutination, Radioimmunoassay (RIA), Immunoperoxidase Staining, Immunofluorescence, and Others]; End User [Hospitals, Clinics, Laboratories, Diagnostic Centers, Blood Banks, and Research Institutes],  and Geography