Docotors are warning that a new Covid variant causes "more fever" compared with previous strains - though vaccines do seem to work well against it.
The Arcturus variant is spreading across the world, and health officials have said it has symptoms not seen in previous strains.
Doctors say the strain's mutation makes it highly transmissible, reports the Mirror. Dr. William Schaffner, an infectious disease specialist at Vanderbilt University Medical Center in Nashville, Tennessee, said: "It tends to produce more fever than some of the other strains we've seen."
