Keyphrases
Healthy Adults
100%
Clean Air
100%
Nitrogen Dioxide
100%
Influenza-like Illness
100%
Nitrogen Effect
100%
Infection Rate
50%
Respiratory Infection
50%
Influenza A
50%
NO2 Exposure
50%
Cold-adapted
50%
Older Adults
25%
Non-smoking
25%
Adult Volunteers
25%
Virus Infection
25%
Healthy Volunteers
25%
Consecutive Days
25%
Pulmonary Function
25%
Specific Antibodies
25%
Influenza Virus
25%
Placebo-controlled
25%
Influenza
25%
Antibody Titer
25%
Nasal Wash
25%
NO2 Concentration
25%
Human Susceptibility
25%
Randomized Double-blind Trial
25%
Live Attenuated
25%
Air Control
25%
H3N2 Virus
25%
Low-grade Fever
25%
Reassortant Virus
25%
Airway Reactivity
25%
Virus Recovery
25%
Immunology and Microbiology
Viral Disease
100%
Normal Human
100%
Influenzavirus A
100%
Influenza
75%
Infection Rate
50%
Respiratory Virus
50%
Monospecific Antibody
25%
Antibody Titer
25%
Lung Function
25%
Influenza A Virus (H3N2)
25%
Reassortment
25%
Pharmacology, Toxicology and Pharmaceutical Science
Virus Infection
100%
Normal Human
100%
Nitrogen Dioxide
100%
Influenzavirus A
100%
Infection
50%
Infection Rate
50%
Symptom
25%
Placebo
25%
Antibodies
25%
Methacholine
25%