Chinese companies producing faulty testing kits and masks are marring Beijing's attempts to assert leadership in the fight against the coronavirus.

L.A. County officials warned Friday that the region needs to increase social distancing to slow the spread of coronavirus. Stay-at-home restrictions could remain into summer.

Getty Images' John Moore documented emergency medical workers on the ground in New York in the first week of April as the coronavirus ravaged the state.

Some patients who have recovered from coronavirus infection are suffering lasting damage, including liver damage, heart damage and blood clotting problems.

A preliminary report on patients infected with the coronavirus suggests the drug remdesivir may lower the risk of death in those with severe cases of COVID-19.

Doctors caring for the sickest COVID-19 patients are trying new ways to attack the coronavirus. One theory is that they have blood clots in their lungs.

A diagnosis of breast cancer is always accompanied by angst and uncertainty. It's even more fraught when it comes in the midst of the coronavirus crisis.

After the coronavirus pandemic cools down, how will California start getting back to normal? Slowly, methodically and in stages.

Until there's a vaccine to prevent infection with the new coronavirus, old vaccines against other germs might help. Scientists are testing them now.

A UCLA medical epidemiologist and infectious disease expert discusses a possible timeline for reopening California after the coronavirus shutdown.

With a smartphone app and a little free time, citizen scientists can share coronavirus data that might help bring the COVID-19 pandemic under control.

Ultraviolet light may become an important tool for fighting the coronavirus by sterilizing masks and other high-touch items. We look at what UV light can and can't do.

CanSino Biologics of China is in the second phase of testing a coronavirus vaccine candidate, and a U.S. shot by Moderna and the NIH isn't far behind.

It could be sometime in May before California officials begin to seriously contemplate how they might start to gradually ease the stay-at-home order.

This may help explain why the coronavirus has hit the U.S. so hard: Obesity appears to be a risk factor for serious cases of COVID-19.

Here's an inside look with doctors and nurses on the frontlines of the COVID-19 battle.

Wear a mask when inside an essential business, or when riding a bus or train. The cities of Long Beach, Pasadena and L.A. have issued similar orders.

A study of COVID-19 patients and the people they likely infected suggests the coronavirus can spread for more than two days before symptoms appear.

A two-decade-long dry spell that has parched much of the western United States is turning into one of the deepest 'megadroughts' of the past 1,200 years.

The tobacco industry sees the sales potential in the pandemic, offers up freebie protective gear, doorstep deliveries, festive discounts.

With no treatment for the new coronavirus, some people are trying alternative medicines. In China and India, the government has advised them to do so.

Nurses around the world are risking their lives tending to coronavirus patients.

A new study by Stanford University, using antibody blood tests, estimates that the number of cases in Santa Clara County may be 50 to 85 times greater than what was previously known.

Hydroxychloroquine, the drug President Trump hailed as a coronavirus killer, had no beneficial effect for COVID-19 patients in two controlled trials.

Men contending with coronavirus infection may have a pair of vulnerabilities that could increase their risk of longer, more severe illness: their testicles.

A study shows roughly 4% of L.A. County residents have contracted COVID-19, suggesting it might be less fatal locally than originally believed.

There are two main types of coronavirus tests. One tells you if you have an active infection, and the other checks to see if you were infected before.

California is now giving coronavirus testing priority to asymptomatic people in high-risk settings such as nursing homes and prisons.

What do scientists wish they knew about the coronavirus? Which treatments actually work, what antibodies are good for, and which public health measures help.

Coronavirus: Autopsies reveal the first confirmed U.S. COVID-19 deaths occurred in Bay Area in February.

As people across the globe stay home to stop the spread of the new coronavirus, Earth is becoming cleaner and more wild.

You've heard the term "herd immunity." Here's what it means and why it's important as we think about returning to something like a normal life.

Is a second wave of the coronavirus outbreak inevitable? Scientists say that depends on the nature of the virus itself as well as our own behavior.

Coronavirus: After weeks of backlogs, it's getting easier to obtain a coronavirus test in California.

Studies are finding that cigarette smokers are more likely to have severe cases of COVID-19, the disease caused by coronavirus. Many lung doctors say that doesn't surprise them much.

A government scientist felt pressure to approve a research contract for a lab investigating hydroxychloroquine, a drug Trump has touted as a coronavirus cure.

The maker of Lysol and another disinfectant says its products should not be used as an internal treatment for the coronavirus.

Video and photos show an algae bloom in the South Bay producing a neon-blue light along the shoreline at night in Hermosa Beach.

Testing sewage for the coronavirus may tell scientists how much disease is in a community — and when the virus has finally gone away.

The San Francisco Bay Area has seen consecutive weekly declines in the number of new coronavirus cases. Southern California has seen the pace increase.

The news that estrogen may boost resistance to COVID-19 offered a silver lining to my husband's prostate cancer and a cure for my isolation envy.

It's slowly getting easier to obtain a coronavirus test in California — following an initial rollout marked by restrictions and shortages.

Most people who get COVID-19 will experience mild symptoms and will recover with rest and plenty of fluids. Over-the-counter drugs can help with fever.

Yes, there are significant health risks associated with lockdown. But returning to normal life too soon and rushing herd immunity would be even worse.

Robert Kim-Farley, infectious disease expert, says Stage 4 of Gov. Newsom's reopening plan for California may not be implemented until mid to late 2021.

Herd immunity occurs when a large percentage of a population is immune to an infectious disease. There are two ways to achieve it: by exposing a large percentage of the population to a virus, or by producing a vaccine.

Asian giant hornets in Pacific Northwest are unlikely to attack humans

Jason Schneidman is a man on a mission. He continues to help the L.A.'s homeless population in addition to working with his star clients such as James Corden.

Ditte and Nicolaj Reffstrup call their fashion brand's sustainabilty efforts "a moral obligation."

At a dinner party, Gwyneth Paltrow discussed the vagina-scented candle, Goop's controversial jade egg and some of her favorite beauty and wellness tips.