More than two years after the start of the COVID-19 pandemic that claimed up to 6.5 million deaths, the world is still struggling to find an effective solution to preventing this infection. Despite global spending of roughly $100 billion (a figure that could rise to $160 billion by 2025) on the COVID-19 vaccines, currently used vaccines are not effective against preventing infections and viral spread and can only lessen severe symptoms of COVID-19. SARS-CoV-2 has been undergoing numerous mutations and currently about 90% of COVID-19 cases involve the Omicron variant. Although these variant infections are less severe than caused by the original strain, Omicron spreads faster and is dangerous for the immunocompromised and high-risk individuals.