Table 6. Estimated total R₀ of Alpha and Delta variants in Iran.

Variant	Total Time Interval	EGR	ML	SB	SIR
Alpha	March 10-June 10, 2021	0.9999 (95% CI: 0.99941–1.00043)	1.0468 (95% CI: 1.044–1.049)	1.0613 (95% CI: 1.034–1.089)	2.7949 (95% CI: 2.77–2.81)
Delta	June 22-September 22, 2021	1.0426 (95% CI: 1.042–1.043)	1.0538 (95% CI: 1.051–1.055)	0.7970 (95% CI: 0.63–0.95)	5.6577(95% CI: 5.6–5.7)