[ad_1] <br><a target="_blank" href="https://www.bbc.com/news/business-54916159" rel="noopener noreferrer">Inventors design high-tech helmets for Covid protection</a> <font color="#6f6f6f">BBC Information</font> <br>[ad_2] <br><a href="https://www.bbc.com/news/business-54916159">Source link </a>