If the cases of covid are contained or stamped out then, Winter won't make any difference. The director general of health commented today that there will be hardly any respiratory illnesses (including 'flu and colds) around the community as everyone has been isolating in lock down. This means that if someone had a respiratory illness before of during the lockdown of 4-6 weeks, they would not be contagious after this time. Anyone with a cold or flu symptoms now is asked to get tested for covid and stay in lockdown for another 2 weeks, if they test positive, they will be in an enforced quarantine for 2 weeks.
Also with our borders closed (and returning NZers in quarantine for 2 weeks), no virus's will be imported or transmitted.
NZ is so fortunate to have very rigid controls at present and has made a lot of ground. Our number of active cases are declining and the number of those recovered are rising. Sadly there will be more deaths as covid has got into a couple of rest homes where there are elderly, vulnerable people. Some are already in hospital with staff from the rest homes and other contacts are in isolation.
When we went into lockdown March 25, all people over 70 were told to stay home and were given priority for food deliveries etc, therefore very few have caught the virus. The majority of covid cases have been in people 20-40 age range, who have recovered without being hospitalised. So far there have only been 5 deaths and they've all been elderly people with pre-existing conditions. Four of them were from the same rest home