Nigeria was on alert against the possible spread of Ebola on Saturday, a day after the first confirmed death from the virus in Lagos, Africa's biggest city and the country's financial capital.

The health ministry said Friday that a 40-year-old Liberian man died at a private hospital in Lagos from the disease, which has now killed more than 650 people in four west African countries since January -- the deadliest outbreak in history.

U.S. officials are closely monitoring the outbreak of deadly Ebola virus which has now reached Nigeria, and is working with governments and aid groups to try to stop the spread.

"Our thoughts and prayers are with those fighting the virus," Will Stevens, spokesman for the State Department's Africa bureau, told Agence France Presse.

A commonly used morning-after pill is suitable for use by heavier women, the European Medicines Agency said Thursday after a review of the evidence sparked by the French manufacturer's declaration that the drugs didn't work in women weighing more than 80 kilograms (176 pounds).

Last November, HRA Pharma changed the labels on its morning-after pill Norlevo, marketed in 50 countries, saying it was ineffective in women over 80 kilograms after a study of levonorgestrel, one of the drug's active ingredients. Norlevo is not sold in the U.S. but another drug with the same main ingredient, Plan B One-Step, is widely available. The Food and Drug Administration said last year it was reviewing the issue to see if any label changes were needed.

McDonald's restaurants in Hong Kong have taken chicken nuggets and chicken filet burgers off the menu after a mainland Chinese supplier was accused of selling expired meat.

The fast food chain said late Thursday that it "suspended relevant food ingredients" at Hong Kong outlets in light of the scandal surrounding Shanghai Husi Food Co.

Hashish addict Noor Rehman has spent three years chained to a concrete slab covered by insects.

Beaten and malnourished, he lost his eyesight in a "clinic" run by a Pakistani mullah claiming to cure addicts who were kept against their will and forced to recite the Koran.

A campaign to promote male circumcision to prevent AIDS infection also indirectly benefits women by reducing their risk of contracting the HIV virus, according to a study presented at the world AIDS forum Friday.

In a South African community where large numbers of men had been circumcised, women who only had sex with circumcised partners had a 15-percent-lower risk of being infected by HIV compared with women who also had uncircumcised partners, it found.

Leaving children in parked cars in the blazing heat of summer: it's so obviously wrong, yet it happens with astonishing regularity, with tragic results.

From 1998 through 2013 in the United States, officials say, an average of 38 children a year have died of heat stroke in cars -- the overwhelming majority of them under the age of five.

Surgeons in Mumbai have removed 232 teeth from the mouth of an Indian teenager in what they believe may be a world-record operation, the hospital said Thursday.

Ashik Gavai, 17, sought medical help for a swelling on the right side of his lower jaw and the case was referred to the city's JJ Hospital, where they found he was suffering from a condition known as complex odontoma, head of dentistry Sunanda Dhivare-Palwankar told AFP.

A man used a blunt razor to chop off the testicles of three patients at a Chinese nursing home, state media said Thursday.

The suspect, who has been arrested, castrated a mentally disabled man aged 60 and removed one testicle each from two bedridden patients aged 53 and 80, the official Xinhua news agency said.

Russia's annexation of Crimea has led to a surge in deaths among intravenous drug users, who no longer have access to vital therapy, specialists said at the world AIDS forum on Thursday.

Michel Kazatchkine, former head of the Global Fund to Fight AIDS, TB and Malaria, and now the U.N.'s AIDS envoy for eastern Europe, told AFP he was "very concerned" and had heard of "20 documented deaths, possibly more."