At least 70 cases of coronavirus infection have been confirmed or presumed positive in the U.S., and officials with the federal Centers for Disease Control and Prevention said Americans should expect to hear more reports of illness in the coming days and weeks.

Rudman declined to say how many people are being monitored in Santa Clara, but noted that having so few cases has meant she and her colleagues have had time to be methodical about who might be at risk. She hopes that will provide comfort to others in the community.