California's health department said it was safe to continue to use a batch of Covid-19 vaccine from Moderna Inc for inoculation after a pause due to possible allergic reactions.

Moderna said on Tuesday it had received a report from the California Department of Public Health that several people at a center in San Diego were treated for possible allergic reactions after vaccination from one lot of its vaccine.

The state health department held discussions with various US authorities, including the US Food and Drug Administration and the US Centers for Disease Control and Prevention, and found no scientific basis to continue the pause, state epidemiologist Dr Erica Pan said in a statement.

Moderna confirmed the vaccine would continue to be administered in California when contacted by Reuters.