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:Safety and immunogenicity of a modified process hepatitis B vaccine in healthy adults ≥50 years.  Generating protective immune responses in older adults (particularly ≥65 y) remains challenging for vaccines in general. This study examined the immune response engendered in older adults by RECOMBIVAX HB™ manufactured using a modified adjuvant (modified-process hepatitis B vaccine; mpHBV), RECOMBIVAX-HB™, and ENGERIX-B™. Randomized, double-blind, multicenter study enrolled healthy, seronegative subjects (N=538) to receive mpHBV (10 µg hepatitis B surface antigen [HBsAg]), RECOMBIVAX-HB™ (10 µg HBsAg), or ENGERIX-B™ (20 µg HBsAg) at Day 1, Month 1, and Month 6. Prespecified analysis of subpopulations 50-64 y and ≥65 y was conducted. Serum antibody to HBsAg (anti-HBs) was measured Predose 1 and 1 mo Postdose 3. For subjects ≥50 y, seroprotection rates (SPR, anti-HBs titer ≥10 mIU/mL) were 75.7% (95% CI: 68.0,82.2) for mpHBV, 68.0% (95% CI: 59.8,75.5) for RECOMBIVAX HB™, and 84.0% (95% CI: 77.0,89.6) for ENGERIX-B™. For subjects 50-64 y, SPRs were 82.1% (95% CI: 73.8,88.7) for mpHBV, 77.4% (95% CI: 68.7,84.7) for RECOMBIVAX-HB™, and 88.5% (95% CI: 81.1,93.7) for ENGERIX-B™. For subjects ≥65 y, SPRs were 57.5% (95% CI: 40.9,73.0) for mpHBV, 34.4% (95% CI: 18.6,53.2) for RECOMBIVAX-HB™, and 67.7% (95% CI: 48.6,83.3) for ENGERIX-B™. There were 6 non-vaccine related serious adverse events reported. The majority of subjects ≥50 y old achieved seroprotection. The sub-population ≥65 y had lower vaccination responses than the 50-64 y sub-population. For subjects ≥65 y, mpHBV and ENGERIX-B™ groups achieved higher seroprotection rates than the RECOMBIVAX-HB group. The safety profile of mpHBV was consistent with the other groups. Output:
{'conditions': 'Hepatitis B', 'interventions': 'Biological: Comparator: RECOMBIVAX HBâ„¢ Hepatitis B Vaccine (Recombinant)|Biological: Comparator: Modified Process Hepatitis B Vaccine (Experimental)|Biological: Comparator: ENGERIX-Bâ„¢ (currently licensed product)'}