More than 61,000 cases were recorded in the US on Saturday

At least 3,245,925 cases of coronavirus had been recorded in the United States by the end of the day Saturday Eastern Time, according to Johns Hopkins University. Since the pandemic began, at least 134,777 people have died in the US from the virus. 

On Saturday, Johns Hopkins University reported 61,352 new cases and 685 new virus-related deaths in the country.

The totals include cases from all 50 states, the District of Columbia and other US territories, as well as repatriated cases. 

A woman is instructed on how to swab her nose by a medical worker at a free COVID-19 testing site, on Friday, July 10, in Chelsea, Massachusetts David Goldman/AP

About 40% of people infected with Covid-19 show no symptoms of the disease, according to new guidance from the US Centers for Disease Control and Prevention (CDC).

In May, the CDC created five "Covid-19 Pandemic Planning Scenarios," using data to provide a range of possible situations for the coronavirus in the US.

Those scenarios have now been updated based on new data the agency received in June. 

Under the CDC's "current best estimate," 40% of people with Covid-19 are asymptomatic. This number is up from the 35% the agency estimated on May 20. The number of asymptomatic cases remains uncertain, the CDC emphasized.

The CDC is also now including an infection fatality ratio, which takes into account both symptomatic and asymptomatic cases (in the estimates published in May, the agency only included the fatality ratio for symptomatic cases).

Under the best estimate scenario, the infection fatality ratio is 0.65%, meaning that 0.65% of people infected with Covid-19 will die.

About half of Covid-19 transmissions happen before people get sick; this is up from the 40% estimate in May.

Under the CDC's current best estimate, the transmissibility of the virus from asymptomatic people -- in comparison to people with no symptoms -- is now 75%, down from 100%. However, the agency said this "remains highly uncertain as asymptomatic cases are difficult to identify and transmission is difficult to observe and quantify."

The agency says this new information is "intended to support public health preparedness and planning."

Since the pandemic began, there have been more than 3.2 million confirmed coronavirus cases in the United States, according to Johns Hopkins University.

With more than 3.2 million cumulative cases, that’s more than the population of 21 states, Washington, DC, and Puerto Rico, according to data from the US Census Bureau.

More people in the US now have Covid-19 than live in Chicago, the country's third-largest city, according to US Census Bureau 2019 population estimates.

Medical workers check patients for COVID-19 at a drive-thru testing center in Melbourne, Australia on July 10, 2020. Recep Sakar/Anadolu Agency/Getty Images

The Australian state of Victoria reported another 273 cases of coronavirus and one death on Saturday, according to the state’s Premier Daniel Andrews. 

The state has now recorded 1,184 active cases -- 57 of those are in hospital, with 16 patients in intensive care, Andrews said.

After weeks of keeping the virus under control, Victoria is battling a worrying spike in cases. Last week, the state closed its borders in order to stop the spread.

He urged people to follow the government's stay-at-home order and warned citizens that they would be fined if caught "out and about doing the wrong thing."

Residents in metropolitan Melbourne have been subject to strict lockdown measures since earlier this week. They cannot leave their homes unless it's for grocery shopping, caregiving, exercise or work. 

Healthcare workers test positive: Eight healthcare workers at a hospital in Melbourne have tested positive for coronavirus.

Five of those people are believed to have contracted the virus through community transmission, and not at work, the Alfred Hospital said in a statement released Sunday.

Three of the cases were identified through contact tracing efforts. Currently, no patients have contracted Covid-19 within the hospital.

Schools go virtual: Andrews also said Sunday that most students in metropolitan Melbourne and Mitchell Shire, a municipality north of Melbourne, will return to online learning once the winter break ends on July 20.

Andrews said that students in years 11-12 will be returning to face-to-face learning, while certain year 10 students will also be allowed to return to in-person classes. 

Education Minister Jason Merlino said the state has already rolled out 48,000 laptops and 26,000 WiFi dongles for students who will be doing at home learning.

A health worker cares for a COVID-19-infected patient at the intensive care unit of Anhembi emergency makeshift hospital in Sao Paulo, Brazil on July 1. Miguel Schincariol/AFP

Another 1,071 people have died from Covid-19 in Brazil, health authorities there announced on Saturday.

The South American country's death toll now stands at 71,469, the second-highest in the world. Only the United States has recorded more coronavirus-related fatalities.

Authorities also said that they recorded another 39,023 Covid-19 cases, bringing the nationwide total to 1,839,850 since the pandemic began.

Among those who have tested positive is Brazilian President Jair Bolsonaro. Following his diagnosis, Bolsonaro acknowledged the grave risk posed by the virus, which he has in the past dismissed as just a "little flu."

Brazil has been reporting tens of thousands of new cases, and over 1,000 deaths, a day since late May.

President Donald Trump wore a face mask during a visit at Walter Reed National Military Medical Center in Bethesda, Maryland, on Saturday, July 11. Patrick Semansky/AP

President Donald Trump paid a visit to wounded service members at Walter Reed National Military Medical Center on Saturday and wore a mask after months of refusing to be seen doing so in public.

Trump was seen briefly in a mask while walking with staff, who also were wearing masks, at the medical center in Bethesda, Maryland. He did not make any remarks while wearing one. This is the first time since the pandemic began that the White House press corps got a glimpse of Trump with a face covering.

The President's decision to wear a mask during his Saturday trip to the medical center comes after months of declining to publicly wear one -- against the recommendations of his own administration's public health experts.The President said that wearing a mask while he is in the hospital is “a very appropriate thing.”

“I think when you're in the hospital you should definitely wear a mask. That wouldn't be difficult at all for me,” Trump said in an interview with Telemundo on Friday. 

Over the course of the pandemic, Trump has refused to wear a mask in public, ridiculed those who have and done little to encourage his supporters to embrace the common sense public health measure.

CNN has previously reported that some of the President's aides practically begged him to agree to today’s mask photo op and hope it will encourage skeptical Trump supporters to do the same.

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Bollywood superstar Amitabh Bachchan said he has been hospitalized after testing positive for coronavirus.

The 77-year-old actor tweeted on Saturday that he tested positive for the virus and asked that anyone who has "been in close proximity to me in the last 10 days are requested to please get themselves tested!"

Bachchan is a living legend in Hindi-language cinema and many consider him to be India's greatest living actor.

He starred in his first film in 1969 and has dominated the silver screen since then. To date, Bachchan has made has made more than 180 films in a career spanning five decades -- most of India's 70 years as an independent nation.

Staffers from Colombia's Secretary of Health check Venezuelan Yukpa indigenous ethnic group member, in Cucuta, Venezuela on July 9, amid the COVID-19 pandemic. Schneyder Mendoza/AFP

Venezuela has now recorded 9,178 cases of Covid-19, after another 375 infections were registered in the past 24 hours, the government said Saturday. 

At least 85 people have now died from the virus in the country. Two deaths were reported on Saturday.