Outbreak in California classroom underscores Delta variant risks

As the Education Ministry postpones the resumption of face-to-face lessons at schools, a Covid-19 outbreak at a California classroom may offer some lessons on what risks might lie ahead.

According to a case study published last week, the outbreak is centred at an elementary classroom in Marin County in California, USA, where the outbreak’s index case conducted lessons as the teacher.

Twelve of the 24 students in the class...