Australia's largest city Sydney reported a record one-day increase in local Covid-19 infections Thursday and warned the outbreak would get worse.

Sydney officials sought the help of the military to impose a lockdown of 6 million people. The lockdown is set to enter its sixth week, Reuters said.

In China, authorities have set up checkpoints and suspended flights in the eastern city of Nanjing Thursday, in the nation's worst health crisis in months.

More than 170 people have been infected with the Delta variant in the past 10 days, The Guardian said.

In Japan, two foreign spectators attending the Tokyo Olympics have been hospitalized, a Games representative said Thursday. There are concerns the Olympics will add to the burden of Japan's medical infrastructure.

The capital city is in a state of emergency with virus cases hitting a record high, according to Reuters.

In the Philippines, health officials reported Thursday that they detected 97 additional cases of the Delta variant, 88 of which are local infections.

Of the newly reported infections, 94 have recovered while three have died, CNN Philippines said.

Over in Indonesia, additional 43,855 recovered patients were discharged from hospitals, raising the total tally of recoveries in the country to 2,640,675, health authorities said.

At least 19.10 million people in Indonesia have been given two shots of vaccines, and the number of those who had been immunized with the first doses reached 45.73 million, the health ministry said.

In Malaysia, the country reached another record high for new infections Wednesday, with 17,404. Only six of these were imported infections.

More than half of the new infections were once again from the Klang Valley with 7,170 in Selangor and 2,880 in Kuala Lumpur, according to Channel News Asia.

In Vietnam, officials confirmed 3,698 local patients Wednesday evening, raising the ongoing outbreak's number to more than 116,900.

Among the new patients, Ho Chi Minh City recorded the most, with 2,333, followed by its neighbor Binh Duong Province, with 630, and the Mekong Delta province of Dong Thap, with 152, VNExpress said.

In South Korea, the government said Thursday there were 1,895 new infections Wednesday, its highest-ever daily increase.

South Korea struggles to contain a fourth wave of outbreaks fanned by the Delta variant, CNA said.

Over in Thailand, volunteers turned a cargo warehouse at Bangkok's Don Muang Airport into a 1,800-bed field medical facility.

Thailand deals with its biggest outbreak to date, with a daily record of 16,533 new infections and 133 new deaths Wednesday, CNN said.

In Singapore, protecting the country's health care system was a "deeper underlying reason" for going back to tighter restrictions in recent weeks, Health Minister Ong Ye Kung said.

Singapore can open up around 1,000 intensive care unit beds for critically ill patients if needed, Ong said.

In India, preliminary results from a study of nearly 1.6 million health care and front-line personnel of the India armed forces have shown a 93% drop in cases after immunization with Covishield.

Covishield, the made-in-India variant of Oxford-AstraZeneca's AZD-1222 formulation, is the predominant vaccine being used in India's mass vaccination campaign.

Worldwide, there are currently 194 million cases and 4.19 million deaths.