The news was released by the Centre for Disease Prevention and Control (SPKC) in its regular Friday afternoon update, as Lithuania's 14-day cumulative average of new COVID-19 cases stands at 18.8 per 100,000 of population.
The threshold applied by Latvia is 16 cases per 100,000 of population.
Estonia was added to the list of countries requiring quarantine a week ago. Its figure is currently 25.4 cases. Latvia's own figure is 4.4 according to the European Centre for Disease Prevention and Control.
Atceries, ka atgriežoties no valstīm, kuras iekļautas sarakstā sarkanā un dzeltenā krāsā, obligāti jāievēro 10 dienu pašizolācija!— SPKC.gov.lv (@SPKCentrs) September 18, 2020
Pilns valstu saraksts pieejams šeit:https://t.co/3MeMtcGbbj pic.twitter.com/jJgG1ubKla
In 31 European countries, the prevalence of Covid-19 is considered to be so high that when returning to Latvia after visiting these countries, 10 days of self-isolation must be observed. The period of self-isolation required was recently lowered from 14 to 10 days.
The changes come into effect from Saturday, September 19. After midnight self-isolation must be observed when entering Latvia from Lithuania.
The full list of countries classed as "red" or "yellow" is available at the SPKC website, in English, Latvian and Russian, along with advice on how to follow the self-isolation rules and the conditions applying to all persons, be they Latvian nationals or other nationalities.