Record day for the Australian team at Tokyo Olympic Games

Australia's Olympic team had a record day at the Olympics yesterday.

With gold to Ariarne Titmus in the women's 200m freestyle, our women's and men's rowing teams taking home a gold each and two bronzes, and there was bronze in the men's 4x200m freestyle relay and to cyclist Rohan Dennis in the individual time trial.

All in all seven medals went to the Australian team.

Today there will be Aussies taking part in golf, swimming, rugby, BMX racing, shooting, sailing, canoe slalom, archery, tennis, water polo and hockey.

No Olympic athletes were among those affected, but the latest numbers bring the total number of positive tests linked to the Olympics since July 1 to 169. A total of 17 athletes have been infected so far.

Sticking with COVID-19 news and the World Health Organisation says the global number of coronavirus deaths during the previous week climbed by 21 per cent. Of the 69,000 new deaths, most were reported in the Americas and Southeast Asia according to the dataset spanning July 19-25.

More than four million people worldwide are confirmed to have died after being infected.

In an email sent to Google's more than 130,000 employees worldwide, CEO Sundar Pichai said the company was now aiming to have most of its workforce back to its offices beginning October 18 and disclosed that once offices are fully reopened, everyone working there will have to be vaccinated.

NSW will hear its COVD figures for the day at the usual 11am press conference, and with an extended lockdown announced yesterday the NSW Opposition says modelling and health advice supporting new measures for the extension should be released immediately.

In Victoria the race is on to find the source of a new COVID-19 case. Close contacts of the Melbourne traffic controller who worked at a drive-through testing site for two days while infectious with COVID-19 are self-isolating.

In science news two leading Australian researchers have received nearly $US2.5 million ($A3.4 million) to conduct research into the use of parasites to help combat chemical and biological weapons.

Professor Alex Loukas and Dr Paul Giacomin from James Cook University are investigating the use of helminths to protect military personnel against bioterrorism agents. Read all about it here.

In sad news, ZZ Top bassist Dusty Hill is dead at the age of 72.

The bearded bass player's death was announced by his bandmates of more than 50 years.