[ad_1] <br><a target="_blank" href="https://www.bbc.com/news/health-55857530" rel="noopener">Covid vaccine: Single-dose Johnson & Johnson jab is 66% effective</a> <font color="#6f6f6f">BBC Information</font> <br>[ad_2] <br><a href="https://www.bbc.com/news/health-55857530">Source link </a>