Of the 21 new infections, 12 were registered in Luanda province, four in Namibe, two in Moxico, two in Zaire and one in Lunda Sul.
The new cases concern patients aged between one month and 63 years, 16 males and five females.
Also in the same period, the death of a 41-year-old woman was reported in the province of Benguela.
The bulletin also reports that there were 22 recoveries, of which 21 were in Luanda and one in Namibe.
The labs processed 1872 samples by RT-PCR with a daily positivity rate of 1.1 percent.
With the most recent data, the country has a total of 98,474 cases, of which 415 are active, 1,897 have died and 96,162 have recovered.