Every time we turn around, there’s a new COVID-19 variant at the door. And with each one’s arrival, more panic seems to set in. While it’s natural to fear the unknown, it’s also good to know that the scientific community is monitoring all variants of COVID-19 in the United States and globally.
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Infectious disease specialist Kristin Englund, MD, shares some insights about variant AY.4.2, also known as “Delta Plus,” and reminds us why we still need to be careful as we roll into the indoor months.
A: Mutations that occur when a virus makes copies of itself are quite common. Some mutations cannot survive, some have no effect and others can make a virus more transmittable or more severe. AY.4.2 is due to a mutation of the SARS-CoV-2 delta variant. The impact of this mutation is not quite clear yet.
A: AY.4.2 has been followed by the World Health Organization (WHO) since July and is present now in dozens of countries. Most of the cases have occurred in the U.K. but even there, it’s only present in about 6% of the cases. In the United States, it’s been present in less than 1% of cases.
A: The AY.4.2 variant has three mutations, with two of them being on the spike protein. The coronavirus uses the spike protein on its outer surface to infect cells by attaching to a protein called the ACE2 receptor that is found on the surface of the lungs and other cells.
A: Mutations can cause vaccine resistance. However, there is no evidence that the AY.4.2 variant is resistant to the vaccines that are currently available. The more people get vaccinated, the fewer mutations occur and the less likely we will see a variant that is vaccine-resistant.
A: As long as you are practicing the precautions already in place such as hand washing, masking, physical distancing and most importantly getting vaccinated, these appear to be as effective in preventing infection with AY.4.2 as with the delta variant.
A: The delta variant is transmitted much easier than the first COVID-19 virus. It has hit younger populations (people in their 30s through 60s) much harder. Children and teenagers are being infected and many of these infections are resulting in ICU admissions and even death. We just topped 5 million deaths worldwide from COVID.
Other ways that the delta variant differs from earlier versions of COVID-19:
A: COVID-19 symptoms can be difficult to differentiate from flu symptoms. That’s why we must remain vigilant about flu-like illnesses and assume that they could be COVID-19. Also, as we head indoors more, the risk for transmitting COVID-19 increases.
A: Ninety percent of patients who have been admitted to hospitals have been unvaccinated. Unvaccinated patients are dying every day. If vaccinated patients do get a breakthrough infection, they are much more likely to either have no symptoms at all or experience mild illness.