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> It's more likely that COVID just out-competed the normal flu.

"Out-competing" another disease requires them to both be present in the population they're competing over. This was never really the case for COVID-19 in New Zealand -- the country went for months with no identified cases of community transmission.

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Thanks. OK. That might be different. If they did already have a very low presence, then they might have just suppressed it and border controls and low traffic prevented seeding new cases from abroad.

Elsewhere in the world we're seeing similar 98% drop in flu cases, starting even before the preventing measures.

Seriously, the discussion in comments in https://twitter.com/kylamb8/status/1317246961255370752 is really good, no matter the ones particular viewpoints.

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