It is the largest number of cases recorded in a single day since May 16 when 27 cases were recorded.
The Disease Prevention and Control Center (SPKC) said 1829 tests had been conducted during the previous 24-hour period.
In total 207,909 tests have been carried out since February 29.
So far 1,070 patients have recovered from infection.
Six patients are in hospital, all described as having moderate symptoms of the disease.
Pēdējās 24h veikti 1829 COVID-19 testi, reģistrēti 18 jauni saslimšanas gadījumi. Latvijā kopā veikti 207 909 izmeklējumi, saslimušas 1275 personas un 1070 izveseļojušās, 32 mirušas.— SPKC.gov.lv (@SPKCentrs) August 6, 2020
SPKC added that 9 of the new cases were related to an outbreak at Murjāņi Sports Gymnasium School. Two are arrivals from abroad (Serbia and Ireland), seven are still being investigated.
A useful summary in English of the latest COVID-19 situation including restrictions in place and rules on public assembly is available at this special government website.
Cīņa ar #COVID19 izplatību nav noslēgusies - iepazīsties ar noteikumiem, kurus nepieciešams ievērot savas un sabiedrības veselības saglabāšanas nolūkā arī pēc ārkārtējās situācijas noslēguma! ☝?— Valdības māja (@Brivibas36) June 10, 2020
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The number for medical emergencies is 113, the number for enquiring about a COVID-19 test if you have developed some potential symptoms after returning from overseas or being in contact with someone confirmed as having coronavirus is 8303 and the SPKC COVID-19 advice helpline is 67387661.
The SPKC has information in English about the approved methods of protecting yourself from the virus, symptoms and medical procedures and an interactive map plotting the incidence and distribution of the disease in Latvia.
See our other story about the latest list of countries which require self-isolation for people arriving in Latvia.