The variant’s spread and dominance in the United Kingdom, which was first hit hard by the Alpha variant — B.1.1.7 — could spell trouble for the United States if people don’t get vaccinated, Fauci said in a White House Covid-19 briefing.
“We cannot let that happen in the United States,” Fauci said, adding it’s “such a powerful argument” to get vaccinated.
The Delta variant “may be associated with an increased disease severity, such as hospitalization risk, compared to (the Alpha variant, B.1.1.7),” Fauci said. The variant is susceptible to available two-dose vaccines from Pfizer and AstraZeneca, he said, but protection from these vaccines requires following a two-dose schedule.
“There is reduced vaccine effectiveness in the one dose,” said Fauci, who is the National Institute of Allergy and Infectious Diseases director. “Three weeks after one dose, both vaccines, the (AstraZeneca)…