Pfizer is close to developing an effective vaccine against the coronavirus.Pfizer said Monday that an early peek at the data on its coronavirus vaccine suggests the shots may be a surprisingly robust 90 per cent effective at preventing COVID-19.Vancouver-based Acuitas Therapeutics, a biotechnology company, is playing a key role through a technology known as lipid nanoparticles, which deliver messenger RNA into cells.“The technology we provide to our partners is lipid nanoparticles and BioNTech and Pfizer are developing a vaccine that’s using a messenger RNA that tells our cells how to make a protein that’s actually found in the COVID-19 virus,” Dr.