The unusual Lambda variant is rapidly spreading in South America. Here’s what we know.
Its mutations help it dodge the immune system. Researchers are scrambling to figure out if it is more dangerous or transmissible than Delta.
A coronavirus variant known as Lambda, which has largely slid under the radar for the past nine months, is now causing almost all new infections in Peru.
Lambda (also known as C.37) was first detected in Peru in August 2020 and has spread to 29 countries, many in Latin America. And, since January 20, 2021, 668 Lambda infections have been reported in the United States. In Peru, Lambda is now responsible for more than 90 percent of new COVID-19 cases, a steep rise from less than 0.5 percent in December. The country has already suffered the world’s worst mortality due to COVID-19; the disease has killed about 0.54 percent of the population.