Álvaro Whittembury

ORCID: 0000-0002-4218-750X
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About
Contact & Profiles
Research Areas
  • Virology and Viral Diseases
  • Vaccine Coverage and Hesitancy
  • Public Health and Environmental Issues
  • Influenza Virus Research Studies
  • Respiratory viral infections research
  • HIV/AIDS Research and Interventions
  • HIV, Drug Use, Sexual Risk
  • SARS-CoV-2 and COVID-19 Research
  • Adolescent Sexual and Reproductive Health
  • Hepatitis B Virus Studies
  • Pneumonia and Respiratory Infections
  • Mosquito-borne diseases and control
  • Hepatitis C virus research
  • Stress and Burnout Research
  • Syphilis Diagnosis and Treatment
  • Health and Lifestyle Studies
  • Educational methodologies and cognitive development
  • Viral Infections and Immunology Research
  • Public Health and Social Inequalities
  • Viral gastroenteritis research and epidemiology
  • Cancer survivorship and care
  • Maternal and Neonatal Healthcare
  • Clinical Nutrition and Gastroenterology
  • Erythropoietin and Anemia Treatment
  • Blood Pressure and Hypertension Studies

World Health Organization Regional Office for the Americas
2007-2025

National University of San Marcos
2012-2023

Pan American Health Organization (Cuba)
2020-2021

Instituto de Medicina Tropical
2014

Ministerio de Educación del Perú
2012

Ministry of Health
2007-2012

Direccion General de Epidemiologia
2011

Centers for Disease Control and Prevention
2007

Instituto Nacional de Salud
2007

ABSTRACT Rubella virus infection is typically diagnosed by the identification of rubella virus-specific immunoglobulin M (IgM) antibodies in serum, but approximately 50% serum samples from cases collected on day rash onset are negative for IgM. The ability to detect IgM sera and oral fluids was compared with RNA reverse transcription-PCR (RT-PCR) using paired taken within first 4 days after suspected during an outbreak Perú. Sera were tested both indirect capture enzyme immunoassays (EIAs),...

10.1128/jcm.01231-08 article EN Journal of Clinical Microbiology 2008-11-13

To systematize and share knowledge lessons learned from the implementation of follow-up vaccination campaigns in Region Americas between 2003 2023. Descriptive report with a quantitative qualitative analysis achievement targets 20 years campaigns. The sources consulted were joint reports to WHO United Nations Children's Fund on data Regional Commission for Monitoring Re-Verification Elimination Measles, Rubella Congenital Syndrome. During period 2023, 68 implemented countries Americas. Of...

10.26633/rpsp.2025.24 article EN cc-by-nc-nd Revista Panamericana de Salud Pública 2025-03-20

This report reviews national data from all Member States on measles, rubella, and congenital rubella syndrome (CRS) elimination in the Region of Americas during 2019–2023. It includes an analysis compliance with vaccination coverage, surveillance indicators, measles outbreaks, as well response capacity laboratory network a country case study that meets indicators. The sources information were integrated epidemiological system for Pan American Health Organization (PAHO)/World (WHO) Joint...

10.3390/vaccines12060690 article EN cc-by Vaccines 2024-06-20

ObjectiveTo assess the seroprevalence of hepatitis B virus (HBV), syphilis, and HIV associated risk factors in pregnant women their male partners from six indigenous populations Peruvian Amazon Basin.MethodsA cross-sectional study was performed Basin. Blood samples were obtained tested for HBV (antibodies to core antigen (anti-HBc) surface (HBsAg)), syphilis (rapid plasma reagin microhemagglutination assay Treponema pallidum antibodies), (ELISA indirect immunofluorescence test). A survey...

10.1016/j.ijid.2012.05.1032 article EN publisher-specific-oa International Journal of Infectious Diseases 2012-08-09

In April 2009, the World Health Organization (WHO) reported emergence of a new influenza (H1N1) virus which led to first pandemic declaration 21st century. Most countries in Latin America and Caribbean (LAC) had national preparedness plan place at this time; however, vaccination component such plans was largely undeveloped. Nevertheless, were able capitalize on infrastructure their immunization programs widespread experience utilizing seasonal vaccine prepare rapidly, developing H1N1...

10.1016/j.vaccine.2011.11.092 article EN cc-by-nc-nd Vaccine 2011-12-12

The Region of the Americas has a long history implementing maternal and neonatal immunization (MNI) programs. Our study aimed to understand state MNI policies, strategies implementation practices in Latin America (LA). Study conducted 5 middle-income countries: Argentina, Brazil, Honduras, Mexico Peru. methods included desk review, interviews with national stakeholders health care providers, focus groups pregnant women observations facilities. Enablers barriers were identified categorized as...

10.1016/j.vaccine.2020.07.051 article EN cc-by-nc-nd Vaccine 2020-09-14

Most persons with rubella virus-specific immunoglobulin M (IgM)- or IgG-positive sera tested positive (98% [n = 178] and 99% 221], respectively) using paired filter paper dried blood spot (DBS) samples, provided that DBS indeterminate results were called positive. For IgM- IgG-negative sera, 97% 98%, respectively, negative DBS.

10.1128/cvi.00144-07 article EN Clinical and Vaccine Immunology 2007-09-20

Hospital malnutrition is a prevalent problem that cause higher morbidity and mortality, poorer response to treatment hospital stay cost.To determine the prevalence factors associated with in peruvian General Hospital.Cross-sectional study including 211 hospitalized patients Medicine Surgery wards. Demographic, clinical anthropometrical indicators' data was collected. Multivariate analysis binary logistic regression. All tests had significance level of 5% (p < 0.05).Prevalence 46.9%....

10.3305/nh.2013.28.4.6390 article ES DOAJ (DOAJ: Directory of Open Access Journals) 2013-07-31

In January 2018, Ecuador changed its routine immunization schedule by replacing one full dose of inactivated poliovirus vaccine (IPV) administered intramuscularly at 2 months age with two doses fractional IPV (1/5th dose, fIPV) intradermally and 4 age; bivalent oral (serotypes 1 3, bOPV) continues to be used. We compared seroprevalence titres polio antibodies achieved the past current schedules.This was a cross-sectional serological survey in children who received bOPV either 2017 or fIPV...

10.1016/j.lana.2022.100235 article EN cc-by-nc-nd The Lancet Regional Health - Americas 2022-03-28

To estimate HIV incidence in the adult population of Peru, 2010, and analyze its distribution based on risk behavior.The UNAIDS model was applied modes transmission (MoT). The information obtained from review detailed 59 documents (1984 - 2008). National databases were also analyzed to obtain specific data. Final selection data validated by technical group a experts. After consultation with experts, values corrected an uncertainty analysis conducted. adjusted 2009 national prevalence...

10.1590/s1726-46342012000400006 article EN cc-by-nc Revista Peruana de Medicina Experimental y Salud Pública 2012-12-01

Purpose. To determine clinical, biochemical, and pharmacological characteristics as well cardiovascular disease prevalence its associated factors among end-stage kidney patients receiving hemodialysis in the main center Lima, Peru. Methods. This cross-sectional study included 103 patients. Clinical charts were reviewed an echocardiogram was performed to of disease, defined presence systolic/diastolic dysfunction, coronary heart ventricular dysrhythmias, cerebrovascular and/or peripheral...

10.1155/2015/568702 article EN cc-by International Journal of Nephrology 2015-01-01

As part of the vaccination activities against influenza A[H1N1]pdm vaccine in 2009-2010, countries Latin American and Caribbean (LAC) implemented surveillance events supposedly attributable to vaccines immunization (ESAVI). We describe serious ESAVI reported LAC order further document safety profile this highlight lessons learned. reviewed data from H1N1 cases Pan Health Organization/World Organization. estimated rates by age target group, as well clinical diagnosis, completed descriptive...

10.1016/j.vaccine.2014.10.070 article EN cc-by-nc-nd Vaccine 2014-11-06

OBJECTIVE: To determine the proportion of postpartum women aged 15-49 in Peru who are susceptible to rubella, order help address strategies eliminate rubella and prevent congenital syndrome (CRS) country. METHODS: A cross-sectional survey was conducted during March April 2003 six main regional hospitals, three geographic regions (coast, mountain, jungle) Peru. For provided written informed consent, a questionnaire administered blood specimen collected. Sera were tested for immunoglobulin G...

10.1590/s1020-49892007000700005 article EN Revista Panamericana de Salud Pública 2007-08-01

<bold>Objetivo.</bold> <italic>Determinar la efectividad de Estrategia para el Crecimiento y Desarrollo Integral (ECDI) World Vision Perú sobre anemia, desnutrición, desarrollo psicomotor cuidado protección infantil en niños menores tres años edad que residían comunidades rurales Región Ayacucho del Perú</italic>. <bold>Métodos.</bold> <italic>Se realizó un estudio cuasiexperimental distritos región Ayacucho, Perú. La medición anemia se con sangre capilar analizador HemoCue®, ajuste los...

10.26633/rpsp.2017.112 article ES cc-by-nc-nd Revista Panamericana de Salud Pública 2017-11-17

Introducción: Las pacientes con cáncer de mama tienden a desarrollar algún tipo trastorno psiquiátrico, principalmente depresión. Una manera evaluar cómo las conllevan su enfermedad es través la calidad vida. Objetivos: Determinar prevalencia sintomatología depresiva y vida sus asociaciones el tiempo desde diagnóstico estado menopáusico. Diseño: Estudio analítico, observacional transversal. Lugar: Servicio Oncología del Hospital Arzobispo Loayza. Participantes: Mujeres clínico e histológico...

10.15381/anales.v67i4.1314 article ES cc-by-nc-sa Anales de la Facultad de Medicina 2013-03-05

The COVID-19 pandemic poses a significant global health threat, characterized by high morbidity, severity, and the emergence of concerning variants. Latin America has been greatly affected, with infection mortality rates. Vaccination plays crucial role in mitigating severe disease controlling pandemic. This study aims to assess effectiveness vaccines preventing SARS-CoV-2 acute respiratory infections (SARI) hospitalized vaccination target groups Ecuador. is test-negative design study. We...

10.1016/j.jvacx.2023.100404 article EN cc-by-nc-nd Vaccine X 2023-11-08

Background. Rubella during pregnancy can cause serious fetal abnormalities and death. Peru has had integrated measles/rubella surveillance since 2000 but did not implement congenital rubella syndrome (CRS) until 2004, in accordance with the Pan American Health Organization recommendations for elimination. The article describes experience from CRS sentinel system Peru.

10.1093/infdis/jir407 article EN The Journal of Infectious Diseases 2011-09-01

In 2022, an estimated 5 million persons in the World Health Organization Region of Americas (AMR) were living with chronic hepatitis B virus (HBV) infection, leading cause hepatocellular carcinoma and cirrhosis worldwide. Most infections are acquired through mother-to-child transmission (MTCT) or horizontal during childhood preventable vaccination, including a birth dose (HepB-BD), followed by 2-3 additional doses (HepB3) infancy. The Pan American (PAHO) Elimination MTCT HBV infection...

10.15585/mmwr.mm7329a3 article EN MMWR Morbidity and Mortality Weekly Report 2024-07-25

El estudio tuvo como objetivo determinar la prevalencia y distribución de Giardia lamblia en población peruana entre 1990 2018. Se realizó una revisión sistemática metaanálisis estudios transversales. incluyeron originales sobre G. lamblia, parasitismo intestinal o cohorte que incluían datos prevalencia; diagnosticados por examen parasitológico, detección antígenos, PCR análisis genético, publicados 2018 español, inglés, portugués francés realizados humanos. Las búsquedas se realizaron...

10.15381/rivep.v34i2.21263 article ES Revista de Investigaciones Veterinarias del Perú 2023-04-28

Objectives. To estimate HIV incidence in the adult population of Peru, 2010, and analyze its distribution based on risk behavior. Materials methods. The UNAIDS model was applied modes transmission (MoT). information obtained from review detailed 59 documents (1984 – 2008). National databases were also analyzed to obtain specific data. Final selection data validated by technical group a experts. After consultation with experts, values corrected an uncertainty analysis conducted. adjusted 2009...

10.17843/rpmesp.2012.294.388 article EN cc-by-nc Revista Peruana de Medicina Experimental y Salud Pública 2014-02-05
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