SMS Mobile Technology for Vaccine Coverage and Acceptance (Vaxtech)

This study has been withdrawn prior to enrollment.
(not human subjects research, no subjects enrolled)
Information provided by (Responsible Party):
University of Colorado, Denver Identifier:
First received: August 8, 2012
Last updated: July 24, 2015
Last verified: July 2015
To pilot test a mobile phone SMS system that will provide periodical messaging texts to mothers or custodians of infants who come for their first dose vaccines within the first 3 months of life to improve timely immunization coverage, vaccine acceptance and ensure vaccine safety monitoring. The intervention will include a "cloud-based" information system alimented by mobile phone data entry at the health post nurse level, that links child vaccination status and is able to remind parents and nurses of the need for next vaccination appointment and provide a system for reporting of adverse events following immunization in the immediate post-vaccination period.

Condition Phase
Adverse Event Following Immunization
Phase 4

Study Type: Observational
Study Design: Observational Model: Cohort
Time Perspective: Prospective
Official Title: SMS Mobile Technology for Vaccine Coverage and Acceptance in Guatemalan Infants

Further study details as provided by University of Colorado, Denver:

Primary Outcome Measures:
  • Number of days unvaccinated [ Time Frame: 9 months of age ] [ Designated as safety issue: No ]
    Number of days that a child is not vaccinated with the recommended dose of vaccines according to the age schedule of the National Immunization Program in Guatemala

Secondary Outcome Measures:
  • AEFI reports [ Time Frame: 9 months ] [ Designated as safety issue: Yes ]
    Number of perceived serious adverse events following immunization (AEFI) in infants receiving their routine vaccines in the first 3 days after vaccination.

Enrollment: 0
Study Start Date: September 2012
Study Completion Date: June 2015
Primary Completion Date: June 2015 (Final data collection date for primary outcome measure)
SMS Vaccine
Mothers will be sent an SMS message reminding them to come for their scheduled vaccines 1 week prior to the date of 2nd and 3rd doses
Mothers will serve as a control, and will be sent a message to remind them to continue breastfeeding

  Show Detailed Description


Ages Eligible for Study:   1 Month to 12 Months
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes
Sampling Method:   Non-Probability Sample
Study Population
Infants under 12 months of age from Ministry of Health Clinics in Guatemala City

Inclusion Criteria:

  • Infants 1-3 months of age coming for their 1 dose of primary vaccines

Exclusion Criteria:

  • Received 1 dose of vaccines, excluding BCG
  • No mobile phone
  • Intent to move from the clinic area in the next 6 months
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01663636

University del Valle
Guatemala, Guatemala, 01001
Sponsors and Collaborators
University of Colorado, Denver
Principal Investigator: Edwin J Asturias, MD University of Colorado School of Medicine
  More Information

Additional Information:
No publications provided

Responsible Party: University of Colorado, Denver Identifier: NCT01663636     History of Changes
Other Study ID Numbers: 12-1144, OPP1061430
Study First Received: August 8, 2012
Last Updated: July 24, 2015
Health Authority: Guatemala: Ministry of Public Health and Social Assistance
United Nations: World Health Organization
United States: Institutional Review Board

Keywords provided by University of Colorado, Denver:
mobile phones processed this record on November 27, 2015