A newly-discovered mutation of the delta variant is being investigated in the U.K. amid worries that it could make the virus even more transmissible and undermine Covid-19 vaccines further.
Still, there are many unknowns surrounding this descendent or subtype of the delta variant — formally known as AY.4.2 — which some are dubbing the new “delta plus” variant.
U.K. government health officials have said it’s too early to tell whether the mutation poses a greater risk to public health than the delta variant, which itself is significantly more infectious than the original Covid-19 strain (and its successor, the alpha variant).
The U.K. is currently seeing a prolonged and worrying spike in Covid cases, reporting between 40,000-50,000 new infections per day in the last week, prompting experts to question why the U.K. is so vulnerable to Covid right now.
The delta subtype is reported to be 10-15% more transmissible than the standard delta variant, but it is too early to say for certain whether it has been causing a spike in cases in the U.K.
