Covid nasal spray vaccine “offers rapid and prolonged protection” and “may be of important help in combating the ongoing Covid-19 pandemic, offsetting the limitations of current intramuscular vaccines, particularly at the start of an epidemic. “. Thus a team of Chinese researchers in a pre-publication study on the ‘BioRxiv’ website.
The pre-clinical results in mice indicate that “the animals were well protected against the Beta variant 9 months after vaccination”. The Covid spray vaccine is based on an influenza vector, inserting a gene that encodes the anti-Rbd (receptor-binding domain) antibodies of the Sars-CoV-2 spike protein.
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