| Assoc Prof Dr | Olga | Nunes | Faculty of Engineering, University of Porto | Antimicrobial, Antibiotic, Antibacterial Resistance | Portugal | Best Researcher Award | |
| Dr | Oluwafemi | Balogun | University of eastern finland | Infectious Diseases Prevention, Control and Cure | Finland | Best Researcher Award | |
| Mr | Oluwasegun | Adekoya | Federal University of Agriculture, Abeokuta | Global Trends in Emerging Infectious Diseases | Nigeria | Best Researcher Award | |
| Assist Prof Dr | Om | Prakash | National Centre for Cell Science, Pune, India | Antimicrobial, Antibiotic, Antibacterial Resistance | India | Best Research Award | |
| Prof Dr | Omar | Kherad | Hôpital de la Tour | Infectious Diseases Prevention, Control and Cure | Switzerland | Best Researcher Award | |
| Dr | Onasis Tharcisse Adetumi | Guedegbe | World Bank | others | Benin | 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 | |
| Assoc Prof Dr | Orhan | Akpınar | süleyman demirel üniversity | Diagnosis of Infectious Diseases | Turkey | Best Researcher Award | |
| Dr | Ornnicha | Sathitakorn | Thammasat university hospital | Antimicrobial, Antibiotic, Antibacterial Resistance | Thailand | Best Researcher Award | |
| Assist Prof Dr | Osama Abdalla | Kheiralla | Imam Abdulrahman Bin Faisal University - College of Applied Medical Sciences - Radiological Sciences Department | Diagnosis of Infectious Diseases | Saudi Arabia | Best Researcher Award | |
| Dr | Osamuyimen | Igbinosa | Medstar Washington Hospital Center | Antimicrobial, Antibiotic, Antibacterial Resistance | United States | Best Researcher Award | |
| Dr | Oscar Elisban | Gomez Quispe | Universidad Nacional Micaela Bastidas de Apurímac | Causes and Symptoms of Infectious Diseases | Portugal | Best Researcher Award | |
| Dr | Özge | Soylu-Eter | Istanbul University Faculty of Pharmacy | Treatment for Infectious Diseases | Turkey | Best Researcher Award | |
| Dr | Pablo | Ferrer | Hospital Clinico Universidad de Chile | Diagnosis of Infectious Diseases | Chile | Best Researcher Award | |
| Assoc. Prof. Dr. | Pang-Yen | Chen | Department of Emergency Medicine, Mackay Memorial Hospital | Global Health and Infectious Disease Burden | Taiwan | Best Researcher Award | pencis.com |
| Prof Dr | Paola | Di Carlo | PROMISE Department, University of Palermo | others | Italy | Best Researcher Award | |
| Prof | Paolo | Gisondi | University of Verona | Immunology of Infections | Italy | Best Researcher Award | |
| Dr | Patrick | Gerardin | CHU Reunion | Epidemiology of Emerging and Re-Emerging Infectious Diseases | Réunion | Excellence in Research | |
| Dr. | PEDRO | CRUGEIRA | Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança | Antimicrobial, Antibiotic, Antibacterial Resistance | Portugal | Best Researcher Award | |