Related Subjects
3142 Public health care science
ASCORBIC-ACID
Administration
Ascorbic Acid [administration & dosage
Common Cold [drug therapy
D-ISOASCORBIC ACID
DOUBLE-BLIND
Humans
LARGE-SCALE
Oral
RANDOMIZED CONTROLLED-TRIAL
RESPIRATORY-TRACT INFECTIONS
Randomized Controlled Trials as Topic
Respiratory Tract Infections [drug therapy
SUPPLEMENTATION
SYMPTOMS
Sensory Systems
TWIN CONTROL
WINTER ILLNESS
environmental and occupational health
prevention & control]
therapeutic use]