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Still, it is difficult to determine whether Delta is actually making people sicker than previous forms of the virus or if it is simply circulating amongst more vulnerable populations where case numbers are high, vaccination rates are low and increased stress on hospital systems is impacting patient care and disease outcomes. On July 16, 2021, the Centers for Disease Control and Prevention (CDC) reported a 7-day average increase in new COVID-19 cases of 69.3% and a 35% increase in hospitalizations. One early study assessing the risk of hospital admission in Scotland reported that hospitalization is twice as likely in unvaccinated individuals with Delta than in unvaccinated individuals with Alpha.Ĭase numbers and hospitalizations are once again on the rise in the U.S., especially in states where vaccination percentages are low and the Delta variant is surging. Research is ongoing to determine if Delta infection is associated with increased hospitalization and death. Other reports link Delta to more serious symptoms, including hearing impairment, severe gastrointestinal issues and blood clots leading to tissue death and gangrene. Fever, headache, sore throat and runny nose are common, while cough and loss of smell are not. Is the Delta Variant More Dangerous than Other Variants of Concern?Īccording to surveys conducted in the U.K., where Delta accounts for ~90% of current COVID-19 cases, symptoms of Delta tend to be a little different than other strains, but that does not necessarily mean the associated symptoms are more severe. In response to this information, the World Health Organization (WHO) regards Delta as “ the fastest and fittest” variant so far. A Chinese study reported that viral loads in Delta infections were ~1,000 times higher than those in infections caused by other variants. Furthermore, significantly more viral particles have been found in the airways of patients infected with the Delta variant. Source: Alexey Solodovnikov (Idea, Producer, CG, Editor)ĭata indicate that Delta is 40-60% more transmissible than Alpha and almost twice as transmissible as the original Wuhan strain of SARS-CoV-2.