Scientists probe impact of Indian Covid variant on vaccine efficacy
印度新冠变种“疫苗突破性感染”引发担忧

Lab work suggests at least one new strain of virus is partially vaccine-resistant
在疫情肆虐的印度，一些人接种疫苗后又感染新冠的病例使科学家感到担忧，病毒突变是否会威胁manbetx app苹果 疫苗接种计划的辩论再起。