| Title | First Name | Last Name | Institution/Organization | Subject Track | Country | Selected for | Biography |
|---|---|---|---|---|---|---|---|
| Dr | Ornnicha | Sathitakorn | Thammasat university hospital | Antimicrobial, Antibiotic, Antibacterial Resistance | Thailand | Best Researcher Award | |
| Assoc Prof Dr | Orhan | Akpınar | süleyman demirel üniversity | Diagnosis of Infectious Diseases | Turkey | Best Researcher Award | |
| Assoc Prof Dr | Önder | Tutsoy | Adana Alparslan Tukes Science and Technology University | Infectious Diseases Prevention, Control and Cure | Turkey | Best Researcher Award | |
| Assoc Prof Dr | Önder | Tutsoy | Adana Alparslan Turkes Science and Technology University | Infectious Diseases Prevention, Control and Cure | Turkey | Outstanding Scientist Award | |
| Dr | Onasis Tharcisse Adetumi | Guedegbe | World Bank | others | Benin | Best Researcher Award | |
| Prof. | Omid | Safari | Ferdowsi University of Mashhad | Antimicrobials, Antibiotics, Antibacterials | Iran | Research Excellence Award | pencis.com |
| Prof Dr | Omar | Kherad | Hôpital de la Tour | Infectious Diseases Prevention, Control and Cure | Switzerland | Best Researcher Award | |
| Assist Prof Dr | Om | Prakash | National Centre for Cell Science, Pune, India | Antimicrobial, Antibiotic, Antibacterial Resistance | India | Best Research Award | |
| Dr | Oluwafemi | Balogun | University of eastern finland | Infectious Diseases Prevention, Control and Cure | Finland | Best Researcher Award | |
| Assoc Prof Dr | Olga | Nunes | Faculty of Engineering, University of Porto | Antimicrobial, Antibiotic, Antibacterial Resistance | Portugal | Best Researcher Award | |
| Mr. | OLAYEMI HAFEEZ | RUFAI | University of San Francisco | Vaccines and Vaccination | United States | Best Researcher Award | |
| Mr | Olawale | Olonade | Covenant University | others | Nigeria | Best Researcher Award | |
| Dr | Olaide | Oyelade | University of KwaZulu-Natal | Diagnosis of Infectious Diseases | South Africa | Best Researcher Award | |
| Dr | Ochuko | Orakpoghenor | Ahmadu Bello University | Animal Infectious Diseases, Zoonosis | Nigeria | Best Researcher Award | |
| Mr. | Obsa | Gonfa | LonAdd HR Consultancy Plc | Diagnosis of Infectious Diseases | Ethiopia | Best Researcher Award | pencis.com |
| Assist. Prof. Dr. | O. Alejandro | Aleuy | Florida Atlantic University | others | United States | Best Researcher Award | pencis.com |
| Dr | Nuria | Vázquez | Consejo Nacional de Investigaciones Científicas y Tecnicas | Diagnosis of Infectious Diseases | Argentina | Best Researcher Award | |
| Dr | Nourridine | Siewe | Rochester Institute of Technology | Infectious Diseases Prevention, Control and Cure | United States | Best Researcher Award | |
| Prof | Nourhene | Boudhrioua | ISBST | Infectious Diseases Prevention, Control and Cure | Tunisia | Best Research Award | |
| Dr. | Nourhan | Shaker | Alexandria univeristy | Infectious Diseases Prevention, Control and Cure | Egypt | Best Researcher Award | pencis.com |
| Title | First Name | Last Name | Institution/Organization | Subject Track | Country | Selected for | Biography |
Selected Nominee