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Arms of the Study.
| Groups | N | Assigned intervention |
|---|---|---|
| Cohort A - ARM 1 | 75 | School: IPM intervention Classroom: air filter |
| Cohort B - ARM 2 | 75 | School: IPM intervention Classroom: sham (placebo) air filter |
| Cohort C - ARM 3 | 75 | School: control Classroom: air filter |
| Cohort D - ARM 4 | 75 | School: control Classroom: sham (placebo) air filter |
