Source: United States & Canada – South China Morning PostA new study by the US Centres for Disease Control and Prevention showed that three-quarters of individuals who became infected with Covid-19 at public events in a Massachusetts county had been fully vaccinated.The study, published on Friday, showed that three-quarters of those infected were fully vaccinated, suggesting the Delta variant of the virus is highly contagious.A separate CDC internal document, first reported by The Washington Post on Friday, described the Delta variant as being as…Read More