August 5, 2022 - A highly-transmissible mutation of the omicron COVID variant known as BA.5 is raising concerns globally as it continues to gain traction in several countries, sparking new waves of cases and, in some instances, hospitalizations.

The rise in case rates, even as metrics remain uncertain due to at-home COVID test availability, has sparked warnings and renewed calls for masking in some locations.

The U.K., where BA.4 and BA.5 infections also account for the majority of recent COVID cases, reported runny nose, sore throat, headache, persistent cough and fatigue as its most common symptoms last week.

Less than one-third of people surveyed reported fevers, according to data from the Zoe COVID Symptom Study, which allows people to self-report symptoms through smartphone apps. The symptoms are consistent with those reported in the spring, when the BA.2 subvariant was dominant in the country.

To help slow the spread, the city's Department of Health and Mental Hygiene recommended in a tweet that “all New Yorkers should wear a high-quality mask, such as an N95, KN95 or KF94 in all public indoor settings and around crowds outside."

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Source: <https://www.uchealth.org/today/is-the-ba-5-covid-19-subvariant-super-contagious/>