COVID-19 by the numbers

The Winnipeg Free Press is tracking the growth and stof COVID-19 in Manitoba, as reported daily by provincial health authorities. 

---

---

---

---

---

---

---

---

Proportion of positive tests

The percentage of tests that are positive, referred to as the positivity rate or test positive proportion by the province, shows the infection rate among those tested for the virus. This is another indicator for the extent of infections within Manitoba. A higher positivity rates indicates that the virus is widespread in the population. 

---

Rates across Canada 

Another important statistic is per capita value, which helps compare a value among groups of different sizes. Generally speaking, more populous provinces will have more tests, positive cases and deaths, simply because there are more people. To effectively compare provinces with different populations, we determine how many tests, cases and deaths there are for each person in the province.  Per-capita data is usually reported per 100,000 people to avoid using tiny decimal values.

---

---

---

---

The growth of COVID-19

Tracking the growth of reported COVID-19 cases in Canada, from the tenth case onward, illustrates possible trajectories based on other provinces that are further along the COVID-19 timeline. Manitoba, along with other less populated provinces, follows a gentler curve. 

This chart uses a logarithmic scale, also known as a log scale, on the y-axis to plot case counts for each province.

Logarithmic scales, which are exponential as rather than linear, are useful for displaying and analyzing data that covers a wide range of values. Using a log scale allows the chart to show both the low hundreds in New Brunswick and the high tens of thousands in Quebec without minimizing or downplaying either extreme. 

Beyond COVID-19, logarithmic scales are used to measure the magnitude of earthquakes and the intensity of sound.