Covid-19: New Zealand case mapped and mapped, 7 April | Instant News

The latest series of charts, graphs and visualization of new data by Chris McDowall.

This work is fully funded by the generosity of The Spinoff Members

These posts compile the latest statistics and present them as charts and maps. The Ministry of Health usually publishes data updates in the afternoon, describing the situation at 9 am on the day it is released. This data visualization is interactive – use your mouse or thumb to move the cursor over each graph for more detail.

Note to users of The Spinoff App: if the graph below does not appear, please click here to launch in a separate browser window. An update is imminent!

Ministry of Health figures this afternoon report that the total number of confirmed Covid-19 cases and possibly 1,160 (943 confirmed and 217 likely). As many as 241 people have recovered, an increase of 65 since yesterday. For the first time the number of people recovering in the past 24 hours is greater than the number of new confirmed cases / possibilities.

Yesterday 2,098 tests were processed. The ministry reported an average of 3,063 Covid-19 laboratory tests per day during the week ending April 6. A total of 42,826 laboratory tests have been conducted since March 9. There are 43,885 laboratory testing supplies in stock.

This chart compares active and recovered cases. Active cases are people who currently have the Covid-19 virus. The recovered case is a person who has the virus, but at least 10 days from onset and has not shown any symptoms for 48 hours. Although the ministry does not provide the number of active cases, we can calculate them using the following formula:


Today is the first time we have seen a slight decline in the number of active cases – from 929 active cases yesterday to 918 this morning. Since there are no further deaths related to Covid-19, all these people are now in the recovered category.

Ashley Bloomfield, director general of health, noted that “these signs are promising”. He warned that we are not yet clear and people need to continue to comply with level four precautions.

The symbol map shows Covid-19 cases confirmed and possibly regulated by the district health council. Southern (187), Waitematā (160), Waikato (156) and Auckland (153) remain the four district health councils with the most active cases.

Most attention is given to the health council with a relatively large number of cases. This table shows the sums for all regions. Twelve health councils recorded an increase in the number of confirmed / probable cases in the past 24 hours, seven reported no change and one district reported a decrease. The decrease in Whanganui may be due to a diagnosis likely to prove negative after testing.

Please do not interpret these statistics to imply that each district is “in clarity”. One contagion can grow quickly into one group, especially if people relax with long-distance prevention measures.

There are still 12 significant groups being investigated. The biggest increase occurred in the Bluff marriage cluster, which grew from 62 to 73 cases overnight.

The time series graph that shows confirmed cases and possibly based on “report dates” also looks promising. Remember, however, that the bars near the right side of the chart can be backfilled in the coming days because potential cases are increased to the likelihood or confirmed.

This form of age profile grouping looks similar to last week’s results with groups of 20-29 which accounted for about a quarter of all confirmed / probable cases. People aged 50-59 continue to be the second largest age group, which accounts for more than 16% of cases.

Spinoff science content is possible thanks to the support of MacDiarmid Institute for Advanced Materials and Nanotechnology, a national institution dedicated to scientific research.

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