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The Corona Commission published at noon on Friday which indicators are used to classify risk, as the basis for the traffic light change. Interesting figures can also be read from this: By calendar week 38, the source of infection was unknown in 42 percent of SARS-CoV-2 cases in Austria. Vienna recorded the highest value with 49 percent, Upper Austria the lowest with 19 percent. A quarter of the cases in Austria were asymptomatic.
55 out of 100,000 Austrians tested positive
The seven-day incidence was 54.8. This means that between September 17 and 23, 54.8 people per 100,000 inhabitants tested positive throughout Austria. The current risk classification covers different time periods. In terms of contact tracing, the 38th calendar week of September 14-20 was used. There are large differences between individual federal states in cases with a clear source of infection. Most of the unclear and positive SARS-CoV-2 patients were there, with 49 percent in Vienna. In Salzburg, the source of 47 percent of infections was unclear, in Lower Austria and Vorarlberg it was 41 percent each. In Styria, 40 percent of the cases were without a known source, in Tyrol 34 percent. In Carinthia, it was unclear where they had been infected for 29 percent of those infected, in Upper Austria for 19 percent. There, the source could be found in 81 percent of those infected.
60 to 70 percent would be ideal
More recently, the chief epidemiologist at the Agency for Food Safety (AGES), Daniela Schmid, stated that at least 60 to 70 percent of all coronavirus infections should ideally be traced to their source. If this value falls below 50 percent, it becomes more difficult to work effectively with preventive measures.
The Corona Commission’s analysis also shows that only four percent of positive cases are now travel-related. Five percent were discovered in screening programs, Carinthia recorded the highest value with nine percent, Salzburg and Styria the lowest with two percent. And in Austria, 24 percent of cases were asymptomatic the week before.
Vienna before Vorarlberg
The seven-day incidence was also calculated for all federal states. The federal capital registered by far the highest value. In the week of September 17-23, 114.4 people tested positive for every 100,000 inhabitants. Second came Vorarlberg with a seven-day incidence of 59.4, followed by Tirol with 54.8. Lower Austria landed just below the critical value of 50, with 49 residents for every 100,000 testing positive.
In Upper Austria, the seven-day incidence was 37.6, in Burgenland 35, in Salzburg 33.5 and in Styria 22.5. Carinthia had the fewest infections. There were 14.8 positive tests for SARS-CoV-2 per 100,000 population.
Imported infection
Clear differences were also found in asymptomatic cases. Almost half of the people who tested positive in Upper Austria had no complaints in the past week: 46 were asymptomatic. The fewest cases of SARS-CoV-2 without symptoms were recorded in Vienna with 18 percent and in Vorarlberg with 16 percent. Most travel-related cases occurred in the previous week with 15 percent in Salzburg and 14 percent in Upper Austria, all other federal states showed significantly lower values of cases that were imported, in Lower Austria and Vorarlberg it was only two percent.
Most tests in Vienna
The Corona Commission’s risk assessment also showed a clear picture of the test numbers in the nine federal states. The tests were taken into account until midnight on Wednesday, September 23. Based on 100,000 inhabitants, 1,229 tests were carried out throughout Austria, of which 4.4% were positive. By far the largest number of PCR tests has been performed in Vienna with 2,083 per 100,000 inhabitants; 5.4 percent were positive in the federal capital.
Vorarlberg carried out 1,848 tests per 100,000 inhabitants (3.6% positive), 1,574 Tyrol (3.5% positive) and 1,294 Burgenland (2.7 positive). All other federal states were well below 1,000 in some cases. In Styria, 901 tests have been carried out for every 100,000 inhabitants so far, 2.6 percent gave a positive result. In Carinthia, 884 tests were carried out per 100,000 inhabitants; with 1.8 percent positive cases, the southernmost federal state once again recorded the lowest value.
In Lower Austria there were 877 tests per 100,000 inhabitants (5.4 percent positive), in Upper Austria 802 tests (4.9 percent positive) and Salzburg recorded the fewest tests. To date, 651 PCR tests have been carried out per 100,000 inhabitants, of which 5.2 percent were positive.
