Coronavirus Notebook: Pfizer/BioNTech & Russian Vaccines Each Claim Efficacy Of More than 90%

As data start to come in on the first coronavirus vaccines, hopes are rising that vaccination campaigns will be able to begin in the next month or two, although experts have cautioned against unbridled optimism. Uncertainties also remain over questions such as whom to vaccinate first and how to assure equitable access in less wealthy parts of the world.