The uptick in coronavirus transmission this summer has not brought major alarm from health experts.

But it is raising questions about whether the risks are high enough to go back to safety measures that many have abandoned.

Dr. Peter Chin-Hong, a UC San Francisco infectious diseases expert, said transmission is increasing and “we haven’t seen the crest yet” of the wave.

But swearing off masks for good — even when sitting on a plane next to someone who is coughing or sneezing — would unnecessarily put people at higher risk for illness.

COVID infections and hospitalizations are on the rise in the U.S., Europe and Asia. Health officials are pointing at the EG.5 "Eris" coronavirus, a subvariant of the Omicron lineage that originally emerged November of 2021.

The World Health Organization (WHO) classified EG.5, which has been nicknamed by some as "Eris", as a "variant of interest," indicating that it should be more closely watched than others because of mutations that might make it more contagious or severe.

‘Yes,” University of Texas epidemiologist Katelyn Jetelina declared without hesitation earlier this month when PBS Newshour host John Yang asked if she would again recommend masking in response to a recent uptick in Covid-19 infections. “You should be wearing masks in crowded areas, especially during a surge.” But “what about at home?” or “when you’re walking on the street?” Yang asked. “So, certainly at home it works, if you want to reduce household transmission,” Jetelina replied.

The Biden administration will require airline passengers traveling from China to test negative for Covid before entering the U.S. as concern grows that widespread transmission of the virus in the world’s most populous country could result in new variants.

All airline passengers 2 years and older originating from China, Hong Kong or Macau will be required to get tested for Covid-19 no more than two days before their flight to the U.S. and show a negative result to the airline upon departure, the Centers for Disease Control and Prevention announced on Wednesday.

Travelers flying from China to the United States will be required to show proof of a negative COVID-19 test before they board starting on Jan. 5, the Centers for Disease Control and Prevention announced Wednesday.

Passengers two years and older will be required to show a negative PCR or antigen test taken within two days before departure at the gate, the CDC said in a press release.

The United States will require travelers from China, Hong Kong and Macau to show a negative COVID-19 test before entering the U.S. as restrictions lessen and cases surge in China.

The U.S. Centers for Disease Control and Prevention announced the measure Wednesday to go into effect on Jan. 5 for all passengers over the age of 2. Passengers must show a negative PCR or monitored antigen test no more than two days before their departure, whether it is a direct flight or an indirect one through another country.

Nearly half of the passengers on two recent flights from China to Milan tested positive for COVID-19, Italian health officials said on Wednesday.

About 38 percent of passengers on one flight into Milan’s Malpensa Airport tested positive for COVID-19, as did about 52 percent of those on a second flight, according to local officials in Italy’s Lombardy region.

Italy will begin testing all new arrivals from China and sequencing the tests for new variants amid China’s surge in COVID-19 cases, Italy’s health minister said on Wednesday.

Almost 250 million people in China may have caught Covid-19 in the first 20 days of December, according to an internal estimate from the nation’s top health officials, Bloomberg News and the Financial Times reported Friday.

If correct, the estimate – which CNN cannot independently confirm – would account for roughly 18% of China’s 1.4 billion people and represent the largest Covid-19 outbreak to date globally.

The World Health Organization on Thursday warned that it is struggling to identify and track new Covid variants as governments roll back testing and surveillance, threatening the progress made in the fight against the virus.

Maria Van Kerkhove, the WHO’s Covid-19 technical lead, said the virus is still circulating at an “incredibly intense level” around the world. The WHO is “deeply concerned” that it is evolving at a time when there is no longer robust testing in place to help rapidly identify new variants, Van Kerkhove said.

In August, the Biden Administration announced it will stop being the predominant purchaser of Covid-19 vaccines, treatments, and tests at some point this autumn, as it moves “beyond the crisis phase of the pandemic.” White House Covid-19 Response Team coordinator Dr. Ashish Jha said his “hope is that in 2023, you're going to see the commercialization of almost all of these products.”