Elsevier established a free COVID-19 resource center in 2020, offering English and Mandarin information on the virus. The center grants permission for free access to research in PubMed Central and other repositories. The article discusses the shift to online teaching-learning during the COVID-19 pandemic, highlighting challenges and adaptations. Mizoram University implemented online teaching methods, with teachers and students using various platforms like Zoom, Google Meet, and WhatsApp. The study found that online learning was initially challenging due to technical issues, lack of resources, and difficulty in maintaining engagement. However, with time, teachers and students adapted, using online tools for communication, assignments, and class discussions. The research also noted the importance of digital skills, technical preparedness, and the need for continuous training. Challenges included unstable internet connections, limited access to technology, and the difficulty of maintaining student motivation. Despite these challenges, online learning proved effective in continuing education during the pandemic. The study emphasizes the need for improved digital infrastructure, better access to online resources, and the development of effective online teaching strategies to ensure quality education in the future. The findings suggest that online teaching-learning is a viable alternative to traditional methods, especially in the context of a global pandemic. The study also highlights the importance of mental health support for students and the need for a balanced approach to online and offline learning. Overall, the research underscores the adaptability of educational institutions in the face of unprecedented challenges and the potential of online learning to transform the educational landscape.Elsevier established a free COVID-19 resource center in 2020, offering English and Mandarin information on the virus. The center grants permission for free access to research in PubMed Central and other repositories. The article discusses the shift to online teaching-learning during the COVID-19 pandemic, highlighting challenges and adaptations. Mizoram University implemented online teaching methods, with teachers and students using various platforms like Zoom, Google Meet, and WhatsApp. The study found that online learning was initially challenging due to technical issues, lack of resources, and difficulty in maintaining engagement. However, with time, teachers and students adapted, using online tools for communication, assignments, and class discussions. The research also noted the importance of digital skills, technical preparedness, and the need for continuous training. Challenges included unstable internet connections, limited access to technology, and the difficulty of maintaining student motivation. Despite these challenges, online learning proved effective in continuing education during the pandemic. The study emphasizes the need for improved digital infrastructure, better access to online resources, and the development of effective online teaching strategies to ensure quality education in the future. The findings suggest that online teaching-learning is a viable alternative to traditional methods, especially in the context of a global pandemic. The study also highlights the importance of mental health support for students and the need for a balanced approach to online and offline learning. Overall, the research underscores the adaptability of educational institutions in the face of unprecedented challenges and the potential of online learning to transform the educational landscape.