Fiji health chiefs have admitted for the first time that Covid-19 transmission is widespread in the community after the Pacific nation recorded more than 300 new daily cases.

But authorities continue to reject calls for a nationwide lockdown, saying the 930,000-strong population's failure to obey health rules designed to contain the virus would render it ineffective, AFP reports.

Permanent Secretary for Health James Fong announced that Fiji had recorded 308 new daily virus cases, taking the total number in a second wave of infections that began in April to almost 2,800.

Fong acknowledged calls for a lockdown but said Fiji's public compliance was low and authorities had no ability to enforce it, particularly in the densely populated shantytown settlements that were at most risk.