| Dr | Lebea | Nthunya | University of the Witwatersrand | Antimicrobial, Antibiotic, Antibacterial Resistance | South Africa | Best Researcher Award | |
| Ms | Masara | Nts'aoana | National University of Lesotho | Animal Infectious Diseases, Zoonosis | Lesotho | Best Researcher Award | |
| Assoc Prof Dr | Olga | Nunes | Faculty of Engineering, University of Porto | Antimicrobial, Antibiotic, Antibacterial Resistance | Portugal | Best Researcher Award | |
| Dr | Diola Marina | Nuñez Ramirez | Faculty of Chemical Sciences, Juarez University of the State of Durango | others | Mexico | Best Researcher Award | |
| Dr | Jamil | Obaid | Ibb University | Diagnosis of Infectious Diseases | Yemen | Best Researcher Award | |
| Dr | Sylvester | Obeta | University of Abuja | Epidemiology of Emerging and Re-Emerging Infectious Diseases | Nigeria | Excellence in Research | |
| Assoc Prof Dr | Legesse Lemecha | Obsu | Adama Science and Technology University | Infectious Diseases Prevention, Control and Cure | Ethiopia | Best Researcher Award | |
| Assist Prof Dr | Mohanad Mousa Taha | Odeh | Hashemite University | Infectious Diseases Prevention, Control and Cure | Jordan | Best Researcher Award | |
| Mr. | Paskari | Odoi | Makerere University | Infectious Diseases Prevention, Control and Cure | Uganda | Best Researcher Award | pencis.com |
| Dr. | Abigael Adewuni | Ogunwoye | Kings University, Odeomu, Osun State | Infectious Diseases Prevention, Control and Cure | Nigeria | Best Researcher Award | pencis.com |
| Prof | Halis | Oguz | Selcuk University | others | Turkey | Best Researcher Award | |
| Assoc Prof Dr | Thelma | Okay | Schoo of medicine and Institute of Tropical Medicine/University of Sao Paulo, Brazil | Diagnosis of Infectious Diseases | Brazil | Best Research Award | |
| Prof Dr | Michael | Okoh | University of Abuja | Infectious Diseases Prevention, Control and Cure | Nigeria | Best Research Award | |
| Prof Dr | Imre | Oláh | Semmelweis University Faculty of Medicine Department of Anatomy, Histology and Emriology | Animal Infectious Diseases, Zoonosis | Hungary | Best Researcher Award | |
| Mr. | Ahmed Ahmed | Olaitan | Universiti Sultan Zainal Abidin, Malaysia/Forestry Research Institute of Nigeria | Global Health and Infectious Disease Burden | Nigeria | Young Scientist Award | pencis.com |
| Dr | Fabrício Marcus | Oliveira | Federal University of Minas Gerais | Microbial Pathogenesis and Virulence | Brazil | Best Research Award | |
| Mr | Johnson | Oliyide | Federal University of Agriculture, Abeokuta, Nigeria | others | Nigeria | Best Researcher Award | |
| Mr | Olawale | Olonade | Covenant University | others | Nigeria | Best Researcher Award | |
| Dr. | Ikram | Omar Osman | Caisse Nationale de Sécurité Sociale | Microbial Pathogenesis and Virulence | Djibouti | Best Researcher Award | pencis.com |
| Ms | Amarachi | Onyena | Nigeria Maritime University Okerenkoko | others | Nigeria | Young Scientist Award | |