Remdesivir superior to placebo in double-blind, randomized test (nejm.org)

The abstract mentions "hazard ratio for death, 0.70; 95% CI, 0.47 to 1.04." Should a confidence interval for a ratio metric be symmetric about the estimated value, or is that just a coincidence?

FTR, this is the NIAID study that prompted the emergency use authorization for remedisivir.