ケンブリッジ大もbcgが有効な可能性が高いと。

https://www.cambridge.org/core/journals/epidemiology-and-infection/article/bacillus-calmetteguerin-vaccination-and-clinical-characteristics-and-outcomes-of-covid19-in-rhode-island-united-states-a-cohort-study/2A472746C49A1AB2C6AC698711C5049F