Governments and officials are voicing hopes that Covid-19 vaccines could bring “herd immunity”, with some calculating that immunizing just two-thirds of a population could halt the pandemic disease and help protect whole communities or nations.

The U.S. Patent and Trademark Office granted Emmanuelle Charpentier — co-founder of ERS Genomics — the University of California, and the University of Vienna their first U.S. patent covering the use of CRISPR/Cas9 for gene editing.