"Since December 6, there has been an exponential growth in the proportion of probable cases of the Omicron variant, having reached an estimated proportion of 82.9% on December 29", according to the red lines report of the pandemic of the Directorate- General Health Department (DGS) and the National Institute of Health Doctor Ricardo Jorge (INSA).

According to the report released today, between December 22nd and 28th, 61% of the notified cases were isolated in less than 24 hours, when in the previous week this figure was at 84%.

In addition, 39% of all reported cases had all their contacts tracked and isolated within 24 hours, according to the health authorities' risk analysis.

"The ability to track case contacts reveals signs of pressure," warns the document.

According to the "red lines", in the last seven days, more than 1.5 million tests of covid-19 were carried out, while in the previous week there had been about 1.2 million tests.