NHIS cases continue to be attempted by telephone first due to the coronavirus pandemic. Personal visits are used only to follow-up on nonresponse, to deliver recruitment materials, and to conduct interviews when telephone numbers were unknown. The household response rate for the first quarter of 2021 was 55%. The household response rate steadily increased from 53% in January to 54% in February and 57% in March. The percentage of cases completed by person visit increased from approximately 25% in January and February to 32% in March.