- Scientists have developed an inhaled form of COVID vaccine. It can provide broad, long-lasting protection against the original strain of SARS-CoV-2 and variants of concern. Research reveals significant benefits of vaccines being delivered into the respiratory tract, rather than by injection. https://brighterworld.mcmaster.ca/articles/researchers-confirm-newly-developed-inhaled-vaccine-delivers-broad-protection-against-sars-cov-2-variants-of-concern/ 2890 comments science