New study in Nature finds no such thing as natural immunity to covid after the arrival of omicron. Pre-omicron, infection provided 80% protection against re-infection one year later. This falls to under 5% at one year with omicron
New England’s salt marshes store 10 million cars’ worth of carbon—and add another 15,000-worth every year - EurekAlert
Pig-to-Human Organ Transplants Will Finally Begin Clinical Trials This Year