Antibiotics Market Size, Share & COVID-19 Impact Analysis, By Drug Class (Penicillin, Cephalosporin, Aminoglycosides, Tetracycline, Macrolides, Fluoroquinolones, Sulfonamides, and Others), By Application (Skin Infections, Respiratory Infections, Urinary Tract Infections, Septicemia, Ear Infection, Gastrointestinal Infections, and Others), By Route of Administration (Oral, Parenteral, and Others), By Distribution Channel (Hospital Pharmacy, Retail Pharmacy, and Online Pharmacy), and Regional Forecast, 2021-2028