Please select the eligibility criteria that correspond to the clinical trial below.
Title: Introduction of Cholera Vaccine in Bangladesh: " Impact Evaluation of Cholera Vaccine and Behaviour Change Interventions in Urban Dhaka"
Brief Summary: The purpose of this study is to conduct and evaluate the feasibility and effectiveness of a mass cholera vaccination program to reduce diarrhea due to Vibrio cholerae in a high incidence urban area. This study will also evaluate the feasibility of adding a household hand washing and safe drinking water promotion intervention to a cholera vaccine program and the overall impact of this combination on decreasing the incidence of diarrhea due to Vibrio cholerae.


Options:
A: Inclusion Criteria:

* Students older than 6 years, teachers, administrative and service staff who attend regularly to L'Horitzó school.
* All participants will be required to sign an informed consent form performing a nasal and nasopharyngeal swab for performing a rapid detection test of antigens (In students under the age of 12, informed consent will be signed by their parent or legal tutor, in students equal to or older than 12 years, but under 18 consent it will be signed both by the student and by his / her parent or legal guardian. The participant over the age of 18 will sign the document in person, unless it is incapacitated, in which case you must sign your legal representative).

Exclusion Criteria:

• Not applicable
B: Inclusion Criteria:

* Age 18 years or older
* Negative RT-PCR test at the beginning of the study.
* Negative SARS-CoV-2 serological Elecsys Anti-Sars-CoV-2 test at the beginning of the study.
* Living in a geographic area with active COVID-19 transmission (number of
* cases reported locally).
* Living in a geographic area that has been determined by the Colombian National Statistics Department (DANE) to have a medium, medium-high, and high vulnerability index (higher prevalence of comorbidities and social and economic vulnerabilities.
* Working outside the home for at least two days a week, during the last week.
* Acceptance to participate in the study regardless of the trial arm assignment through verbal informed consent.

Exclusion Criteria:

* Retired adults or unemployed
* Adults referring previous diagnosis of COVID-19 confirmed by RT-PCR tests or serological antibody tests.
C: Inclusion Criteria:

1. Apparently healthy residents of selected vaccination sites
2. Aged 1 year and above
3. Non-pregnant women
4. Written informed consent

Exclusion Criteria:

1. Age less than 1 year
2. Pregnant women
D: Inclusion Criteria:

* Persons ≥ 5 years old: Influenza-like illness (ILI), defined as history of fever and either cough or sore throat with fever onset within the previous 24 hours
* Persons \< 5 years old: any child with acute fever with onset within the previous 24 hours
* Return to home within 24 hours of presentation to Upazilla Health Complex, Jahurul Islam Medical College Hospital or the local pharmacies; i.e., the index case cannot be admitted for treatment. If admitted, the patient would not be eligible.
* No fever in any bari resident during the 7 days preceding the patient's presentation to hospital (see definition below)
* At least two persons (in addition to the index case-patient) who intend to reside in the bari during the subsequent 20 days
* Residence within 30 minutes travel time (one-way) from the Upazilla Health Complex or Jahurul Islam Medical College Hospital or the local pharmacy.

Answer: C