(CNN)Scientists Ugur Sahin and Ozlem Tureci have dedicated their lives to the field of oncology and infectious diseases, and spent years pioneering personalized immunotherapy treatments for cancer.
The reopening of restaurants, gyms and hotels carries the highest danger of spreading Covid-19, according to a study that used mobile phone data from 98 million people to model the risks of infection at different locations.
A nasal antiviral created by researchers at Columbia University Vagelos College of Physicians and Surgeons blocked transmission of SARS-CoV-2 in ferrets, suggesting the nasal spray also may prevent infection in people exposed to the new coronavirus.
The compound in the spray—a lipopeptide developed by Anne Moscona, MD, and Matteo Porotto, PhD, professors in the Department of Pediatrics and directors of the Center for Host-Pathogen Interaction—is designed to prevent the new coronavirus from entering host cells.
Pfizer, which is developing the vaccine with its German partner BioNTech, now is on track to apply later this month for emergency-use approval from the U.S. Food and Drug Administration, once it has the necessary safety information in hand.
Even if all goes well, authorities have stressed it is unlikely any vaccine will arrive much before the end of the year, and the limited initial supplies will be rationed.
Mutations in coronavirus have triggered culls of millions of farmed mink in Denmark.
Part of the country has been put under lockdown after Danish authorities found genetic changes they say might undermine the effectiveness of future Covid-19 vaccines.
More than 200 people have been infected with mink-related coronavirus.
And the UK has imposed an immediate ban on all visitors from Denmark amid concerns about the new strain.
The U.S. reported 103,087 new daily coronavirus infections on Wednesday, setting a single-day record for cases, according to data from the COVID Tracking Project.
It has been one of the most baffling aspects of the Covid-19 pandemic. Healthy young men and women have become infected with the virus and developed life-threatening side effects. But at the same time, many of their contemporaries have simply shrugged off the condition.
Unknown factors are clearly leaving some people vulnerable to the pandemic’s worst effects even though some of them are young, are not overweight and do not suffer from other obvious health problems. Scientists think that tiny genetic differences are causing some to be struck down while many others are spared.
Slovakia has begun an ambitious project to test everyone over the age of 10 for Covid-19, but the president has said she thinks the idea is "unfeasible".
The operation to test four million people is to last over two weekends.
Infections have soared in Slovakia and officials argue the only alternative would be a total lockdown.
President Zuzana Caputova called for a rethink of the plan after armed forces chiefs said there were not enough trained health workers to carry it out.
Australia has recorded its first day of no local cases of Covid-19 in almost five months.
Zero cases were reported in the 24 hours between 20:00 on Friday and 20:00 on Saturday - the first time this has happened since 9 June.