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Updated: Nov 11, 2025

Early Viral Entry Assays for the Identification and Evaluation of Antiviral Compounds
Published on: October 29, 2015
COVID-19: Antiviral agents and enzyme inhibitors/receptor blockers in development
Manasi P Jogalekar1, Anurag Veerabathini2, Ankit B Patel1
1Brigham and Women's Hospital, Boston, MA 02115, USA.
Insights
Researchers are investigating repurposed antiviral drugs and new vaccines to treat severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the virus causing COVID-19. This review details drug mechanisms, toxicities, and clinical trials for potential COVID-19 treatments.
Area of Science:
- Virology
- Infectious Diseases
- Pharmacology
Background:
- The emergence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in December 2019 has led to the global COVID-19 pandemic.
- The World Health Organization declared a pandemic, and numerous states declared emergencies due to the widespread impact of COVID-19.
- The lack of specific treatments for COVID-19 has prompted urgent research into therapeutic strategies.
Purpose of the Study:
- To provide a comprehensive review of repurposed antiviral drugs for treating COVID-19.
- To elucidate the mechanisms of action, associated toxicities, and clinical trial outcomes of these repurposed agents.
- To highlight ongoing efforts in developing new vaccine candidates against SARS-CoV-2.
Main Methods:
- Computational approaches were employed to screen extensive antiviral compound libraries for potential efficacy against SARS-CoV-2.
- Existing antiviral agents developed for other viral infections were identified for repurposing.
- A review of preclinical and clinical data for select repurposed drugs and vaccine candidates was conducted.
Main Results:
- Advances in computational drug screening have accelerated the identification of potential SARS-CoV-2 therapeutics.
- Several repurposed drugs are under investigation, with ongoing clinical trials evaluating their effectiveness and safety.
- New vaccine candidates are progressing through preclinical and clinical development stages.
Conclusions:
- Repurposing existing antiviral drugs represents a viable strategy in the race to find effective COVID-19 treatments.
- Understanding the mechanism of action and toxicity profiles of repurposed agents is crucial for their clinical application.
- Continued research and development of both repurposed drugs and novel vaccines are essential to combat the COVID-19 pandemic.
Abstract:
Novel 2019 coronavirus (severe acute respiratory syndrome coronavirus 2 [SARS-CoV-2]) and coronavirus disease 2019 (COVID-19), the respiratory syndrome it causes, have shaken the world to its core by infecting and claiming the lives of many people since originating in December 2019 in Wuhan, China. World Health Organization and several states have declared a pandemic situation and state of emergency, respectively. As there is no treatment for COVID-19, several research institutes and pharmaceutical companies are racing to find a cure. Advances in computational approaches have allowed the screening of massive antiviral compound libraries to identify those that may potentially work against SARS-CoV-2. Antiviral agents developed in the past to combat other viruses are being repurposed. At the same time, new vaccine candidates are being developed and tested in preclinical/clinical settings. This review provides a detailed overview of select repurposed drugs, their mechanism of action, associated toxicities, and major clinical trials involving these agents.
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