TOKYO — Transportation minister Kazuyoshi Akaba says Japan will tighten border controls and limit the number of entrants to up to 2,000 per day to guard against the more contagious variants of the coronavirus.
NEW YORK/JERUSALEM (Reuters) - Pfizer Inc and BioNTech SE said on Thursday that real-world data from Israel suggests their COVID-19 vaccine is 94% effective in preventing asymptomatic infections, meaning it could significantly reduce transmission.
Natalie Lambert, an associate research professor at Indiana University School of Medicine, surveyed thousands of "long-hauler" Covid-19 patients, finding that specific symptoms tend to emerge at regular intervals — usually a week or 10 days — resulting in what she calls "waves of symptoms."
Recent Comments