Having a baby: Stages of pregnancy by trimester By Cari Nierenberg Pregnancy lasts about 40 weeks and is divided into three stages, or trimesters, each with unique symptoms and changes in the mother's body and in fetal development.
Novavax's COVID-19 shots are 90% effective, company reports By Nicoletta Lanese The shots are 100% effective against moderate and severe infections.
Breakthrough dengue-prevention strategy passes huge trial By Nicoletta Lanese The trial was conducted in Yogyakarta, Indonesia.
Woman gets rare cowpox infection from her pet cat By Rachael Rettner She received a drug approved for treating smallpox from the U.S. Strategic National Stockpile.
New discovery could help take down drug-resistant bacteria By Nicoletta Lanese The team tested this new strategy in mice and lab dishes.
Mood swings & mommy brain: The emotional challenges of pregnancy By Cari Nierenberg A woman's emotional well-being and her mental outlook play important roles in pregnancy.
Should 12-year-olds get the COVID-19 vaccine? By Ashley P. Taylor The benefits of vaccinating young people against COVID-19 outweigh the risks, experts say.
Laughing gas may treat depression, small study suggests By Ashley P. Taylor As many as one in three cases of depression are resistant to standard treatments. Could laughing gas be an alternative?
Boy gets burned by wet cement in rare case By Rachael Rettner A 7-year-old boy who accidentally got wet cement all over his head and torso ended up in the emergency room after the cement mixture burned his skin, according to a new report.
How much does all the SARS-CoV-2 in the world weigh? By Yasemin Saplakoglu If all the circulating SARS-CoV-2 particles were gathered together into one place, they would weigh somewhere between the weight of an apple and that of a young toddler.
Scientists puzzled by 'unexplained excess mass' lurking in human chromosomes By Brandon Specktor Human chromosomes weigh about 20 times heavier than the DNA within them. So where's all this extra mass coming from?
Is the COVID-19 vaccine causing rare myocarditis cases? By Rachael Rettner Researchers in Israel say they've found a possible link between the Pfizer-BioNTech COVID-19 vaccine and cases of heart inflammation called myocarditis in young men.
Scientists reprogrammed bacteria to be immune to viruses By Nicoletta Lanese The technology could be used in many fields, from drug development to materials research.
Mysterious protein makes human DNA morph into different shapes By Cameron Duke Human and mosquito cell nuclei have their own shapes, and researchers can mold one to look like the other.
2 types of flu viruses may have gone extinct By Rachael Rettner If true, officials could have an easier time picking the strains of flu viruses included in the seasonal flu shot.
11 children diagnosed with new form of ALS By Rachael Rettner The researchers have pinpointed a gene that seems to cause this form of the disease.
China reports first known human case of H10N3 bird flu By Nicoletta Lanese No additional cases of human infection were identified, according to China's National Health Commission.
Coronavirus variants to be named using Greek letters, WHO says By Nicoletta Lanese The new names do not replace the variants' scientific names, but serve as an easy alternative.
COVID-19 can infiltrate insulin-producing cells in the pancreas, study suggests By Nicoletta Lanese The finding still needs to be validated with further research.
