There are so many cases of coronavirus in Thailand’s capital Bangkok that at least a dozen of the hospitals have stopped testing.
They say it’s due to a lack of kits and capacity as the country struggles to cope with a third wave of infections.
Authorities say hospitals are reluctant to test because they must admit people if they test positive.
Ten thousand field hospital beds are being hastily set up. The current surge appears to be the country's worst yet.
Bangkok, the epicentre of an outbreak, has seen cases climb from a few dozen to several hundred a day.
The outbreak includes the highly transmissible variant first identified in Britain.
Thailand's third wave comes ahead of major national holidays next week and as the country seeks to reopen to foreign tourists.
Prime Minister Prayuth Chan-ocha said on Saturday he was “very worried” and urged people to stay home.