Your goal is to extract structured information from the user's input that matches the form described below. When extracting information please make sure it matches the type information exactly. Do not add any attributes that do not appear in the schema shown below.

```TypeScript

 { // Information on the clinical trial characteristics from the abstract
 conditions: string // The condition or disease being treated in the clinical trial
 drug_or_intervention: string // The drug or intervention used in the clinical trial
}
```


Please output the extracted information in JSON format. Do not output anything except for the extracted information. Do not add any clarifying information. Do not add any fields that are not in the schema. If the text contains attributes that do not appear in the schema, please ignore them. All output must be in JSON format and follow the schema specified above. Wrap the JSON in <json> tags.



Input:A single dose of unadjuvanted novel 2009 H1N1 vaccine is immunogenic and well tolerated in young and elderly adults.  When the novel H1N1 influenza A strain appeared in April of 2009, development of novel H1N1 vaccines became a public health priority. We conducted a phase‐2, multicenter, randomized, placebo‐controlled, observer‐blind clinical trial of a 2009 H1N1 vaccine in 1313 young (age, 18-64 years) and older (age, >or=65 years) adults. Participants were randomized 1:4:4:4 to receive 2 doses of placebo or 7.5, 15, or 30 μg of H1N1 hemagglutinin administered 21 days apart. In post hoc analyses, hemagglutination inhibition (HI) titers measured at baseline and after vaccination were analyzed for young adults (age, 18-64 years), "younger elderly" adults (age, 65-74 years), and "very elderly" adults (age, >or=75 years). At baseline, 28.8% of young adults, 43.9% of younger elderly adults, and 62.9% of very elderly adults had HI titers to A/2009 H1N1 of >or=1:40. A single 7.5‐μg dose induced HI titers >or=1:40 in 94.5% (95% confidence interval [CI], 91.8%-96.3%) of all adults. After one 7.5‐μg dose, the geometric mean titers achieved were 326.4 (95% CI, 275.9-386.0) in young adults, 155.4 (95% CI, 123.4-195.8) in "younger elderly" adults, and 243.9 (95% CI, 167.1-356.0) in "very elderly" adults. This large phase-2 trial demonstrated that a single 7.5‐μg dose of a monovalent unadjuvanted H1N1 vaccine induced protective HI antibody levels in adults of all ages, including very elderly adults. Clinicaltrials.gov identifier NCT00958126. Output:
{'conditions': 'Influenza', 'interventions': 'Biological: CSL425|Biological: CSL425|Biological: Placebo'}