Anthonet L. Koen

Johannesburg, GT, South Africa

Last Updated: 09/26/2026

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Found 41 publications

Persistence of Antibodies at Three, Four and Five Years of Age to Ten-valent Pneumococcal Polysaccharide Protein D-conjugate Vaccine in South African Children According to HIV Status.

Persistence of Antibodies at Three, Four and Five Years of Age to Ten-valent Pneumococcal Polysaccharide Protein D-conjugate Vaccine in South African Children According to HIV Status.

Journal: The Pediatric infectious disease journal

Published: January 07, 2026

Waning of measles immunity by 5 years of age following an accelerated two-dose measles vaccine schedule at 6 and 12 months in South African children: an observational cohort study.

Waning of measles immunity by 5 years of age following an accelerated two-dose measles vaccine schedule at 6 and 12 months in South African children: an observational cohort study.

Journal: Vaccine

Published: December 28, 2025

Serotype-specific serum immunoglobulin G at 18 months of age following one or two doses of a primary series of 10-valent or 13-valent pneumococcal conjugate vaccine and a booster dose at nine months of age: a randomized controlled study.

Serotype-specific serum immunoglobulin G at 18 months of age following one or two doses of a primary series of 10-valent or 13-valent pneumococcal conjugate vaccine and a booster dose at nine months of age: a randomized controlled study.

Journal: Expert review of vaccines

Published: January 27, 2025

T-cell responses induced by SARS-CoV-2 index-virus nanoparticle protein vaccine to the ancestral and omicron variants 6 months following primary vaccination.

T-cell responses induced by SARS-CoV-2 index-virus nanoparticle protein vaccine to the ancestral and omicron variants 6 months following primary vaccination.

Journal: Communications medicine

Published: November 29, 2024

Single priming and a booster dose of 10-valent and 13-valent pneumococcal conjugate vaccine (PCV) maintains suppression of vaccine serotype colonization in South African children at 3, 4, and 5 years of age: a single-centre, open-labelled, randomized trial.

Single priming and a booster dose of 10-valent and 13-valent pneumococcal conjugate vaccine (PCV) maintains suppression of vaccine serotype colonization in South African children at 3, 4, and 5 years of age: a single-centre, open-labelled, randomized trial.

Journal: Expert review of vaccines

Published: October 17, 2024

Immunogenicity and safety of SARS-CoV-2 recombinant spike protein vaccine in South African people living with and without HIV-1 infection: A phase 2 randomised trial.

Immunogenicity and safety of SARS-CoV-2 recombinant spike protein vaccine in South African people living with and without HIV-1 infection: A phase 2 randomised trial.

Journal: The Journal of infection

Published: May 15, 2024

Safety and Pharmacokinetics of Nirsevimab in Immunocompromised Children.

Safety and Pharmacokinetics of Nirsevimab in Immunocompromised Children.

Journal: Pediatrics

Published: March 08, 2024

Impact of nutritional status on vaccine-induced immunity in children living in South Africa: Investigating the B-cell repertoire and metabolic hormones.

Impact of nutritional status on vaccine-induced immunity in children living in South Africa: Investigating the B-cell repertoire and metabolic hormones.

Journal: Vaccine

Published: January 24, 2024

Longitudinal IgA and IgG Response, and ACE2 Binding Blockade, to Full-Length SARS-CoV-2 Spike Protein Variants in a Population of Black PLWH Vaccinated with ChAdOx1 nCoV-19.

Longitudinal IgA and IgG Response, and ACE2 Binding Blockade, to Full-Length SARS-CoV-2 Spike Protein Variants in a Population of Black PLWH Vaccinated with ChAdOx1 nCoV-19.

Journal: Viruses

Published: December 25, 2022

Single priming and booster dose of ten-valent and 13-valent pneumococcal conjugate vaccines and Streptococcus pneumoniae colonisation in children in South Africa: a single-centre, open-label, randomised trial.

Single priming and booster dose of ten-valent and 13-valent pneumococcal conjugate vaccines and Streptococcus pneumoniae colonisation in children in South Africa: a single-centre, open-label, randomised trial.

Journal: The Lancet. Child & adolescent health

Published: December 14, 2022

T-cell responses induced by ChAdOx1 nCoV-19 (AZD1222) vaccine to wild-type severe acute respiratory syndrome coronavirus 2 among people with and without HIV in South Africa.

T-cell responses induced by ChAdOx1 nCoV-19 (AZD1222) vaccine to wild-type severe acute respiratory syndrome coronavirus 2 among people with and without HIV in South Africa.

Journal: AIDS (London, England)

Published: December 08, 2022

Evaluation of Clinical Case Definitions for Respiratory Syncytial Virus Lower Respiratory Tract Infection in Young Children.

Evaluation of Clinical Case Definitions for Respiratory Syncytial Virus Lower Respiratory Tract Infection in Young Children.

Journal: Journal of the Pediatric Infectious Diseases Society

Published: September 16, 2022

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Last Updated: 09/26/2026