More transmissible variants and slower rollout of vaccines increase downside risk to herd immunity timeline. Issues include manufacturing and supply chain problems, more infectious variants, slower adoption for vaccines, vaccines proving to be less effective in reducing meaningful transmission.
Total vaccine doses per 100 people
“There remains a shocking imbalance in the global distribution of vaccines,” WHO Director General Tedros Adhanom Ghebreyesus told a news conference.
Source: BBC News