Please select the eligibility criteria that correspond to the clinical trial below.
Title: SMS Mobile Technology to Improve Early Childhood Vaccine Coverage in Guatemala
Brief Summary: This project plans to learn more about whether sending text messages to parents on their mobile phones to remind them when their child is due for his or her next vaccination will improve children getting vaccinated on time.


Options:
A: Inclusion Criteria:

* First dose of primary vaccination series
* Parents owning a mobile phone and able to decipher SMS messages
* Consent form signed

Exclusion Criteria:

* Moving away from the study site in the next 12 months
* Ineligible for primary vaccination series by the MOH
B: Inclusion Criteria:

1. Be 18 years or older
2. Be known or presumed to be HIV-uninfected at baseline
3. Be initiated on PEP by a healthcare provider in the past six days for a sexual exposure to a known or suspected HIV-infected source
4. STAGE 1 only: Own a mobile phone with text messaging capabilities on which they are willing to potentially receive messages from the text messaging service
5. Be capable of communicating verbally and via text in English
6. Be planning to continue their follow-up locally or be willing to have follow-up study visits conducted remotely; either by telephone or via an encrypted video conferencing system (such as Zoom for healthcare).
7. Be referred to a sexual assault center and provided with necessary counselling and support services if presented for nPEP following sexual assault.

Exclusion Criteria:

1. Creatinine clearance \<30 mL/min (using Cockcroft-Gault formula)
2. Enrolled in any other clinical trial of an HIV prevention intervention
3. Prior participation in this clinical trial for a previous episode of nPEP
4. Known co-infection with chronic hepatitis B at enrollment
5. Current or planned pregnancy or breastfeeding
6. Use of a medication whose co-administration with Biktarvy is contraindicated (dofetilide, carbamazepine, oxcarbazepine, phenobarbital, phenytoin, rifampin, rifampicin, rifabutin, rifapentine, modafinil, dexamethasone, metformin, St. John's Wort)
7. Concomitant use of HIV pre-exposure prophylaxis (PrEP)
8. Stage 2 only: Concomitant use of any non-prescription medication, supplement, vitamin or natural remedy which the patient is unwilling to discontinue during Biktarvy® administration
C: Inclusion: For health care workers (Aim 3):

1. are employees posted at the site;
2. are at least 18 years of age or over;
3. provide health care services to patients as part of the VMMC programs; and
4. are able to provide written informed consent.

For VMMC clients (Aims 1): Eligibility criteria for VMMC clients are:

1. 18 years or older;
2. possession of own phone at enrollment;
3. provides contact details (phone, physical location);
4. receives surgical VMMC;
5. willing to follow MoHCC VMMC protocols;
6. willing to come in Day 14;
7. Able and willing to respond to a questionnaire administered by phone 42 days after circumcision.

Exclusion for Healthcare workers:

1. not willing to participate
2. not willing to be recorded

Exclusion for VMMC clients:

1. men without cell phones;
2. those who chose PrePex as PrePex requires a device-removal visit 7 days after placement and has distinctly different follow-up protocols;
3. men who have an inter-operative AE during routine VMMC will be withdrawn from the study as these men will have known, additional follow-up risks and mandatory in-person visits.
D: Inclusion Criteria:

* Pregnant women \> 18 years
* Prenatal intention to breastfeed
* Prenatal enrollment \< 28 weeks gestation
* Have an unlimited text message cell phone plan
* Knows how to send a text message
* 5th grade literacy level

Exclusion Criteria:

* Lack of fluency in either English or Spanish
* Infant born premature (\<37 weeks)
* \> 3 days in NICU
* Any major maternal-newborn medical problem affecting breastfeeding
* Birth weight \<5lbs

Answer: A