Have a science question on a public policy issue? Ask us.
¿Tiene una pregunta sobre temas de salud o de ciencia? Pregúntenos.
Some research indicates possible negative effects from aspartame, but there’s no definitive evidence linking it to health problems in the general population. Aspartame is safe when consumed within certain limits, according to the U.S. Food and Drug Administration. The daily limit is above the amount people typically ingest.
Q: Is the development of offshore wind energy farms in the U.S. killing whales?
A: Whales have been dying at an unusual rate along the Atlantic Coast since 2016, often from ship strikes or entanglements with fishing gear. Federal agencies and experts say there is no link to offshore wind activities, although they continue to study the potential risks.
Q: Is the use of acetaminophen during pregnancy linked to autism or ADHD?
A: There is currently no strong evidence that acetaminophen use during pregnancy causes autism or ADHD in children. Expert groups continue to recommend use of the drug during pregnancy when necessary and in consultation with a doctor.
Q. Are vaccinated and boosted people more susceptible to infection or disease with the omicron variant than unvaccinated people?
A. No. Getting vaccinated increases your protection against COVID-19. Sometimes, certain raw data can suggest otherwise, but that information cannot be used to determine how well a vaccine works.
Q: How do people who have not been vaccinated against COVID-19 pose a risk to people who have been vaccinated?
A: An unvaccinated person who is infected with COVID-19 poses a much greater risk to others who are also unvaccinated. But vaccines are not 100% effective, so there is a chance that an unvaccinated person could infect a vaccinated person — particularly the vulnerable, such as elderly and immunocompromised individuals.
Q: Can employers, colleges and universities require COVID-19 vaccinations?
A: Generally, they may require immunizations. But there is some uncertainty about the legality of mandating vaccines authorized for emergency use by the U.S. Food and Drug Administration.
Q: Do the COVID-19 vaccines cause infertility?
A: There’s no evidence that approved vaccines cause fertility loss. Although clinical trials did not study the issue, loss of fertility has not been reported among thousands of trial participants nor confirmed as an adverse event among millions who have been vaccinated.
Q: What are the risks of the newly identified coronavirus variants?
A: It’s not yet known whether mutant versions cause more severe disease, but some are likely more contagious. Scientists expect vaccines will work but are monitoring the situation.
Q: Did a recent study in Denmark show that face masks are useless for COVID-19?
A: No. The study found that face masks did not have a large protective effect for wearers — not that masks provide no protection at all or don’t offer benefits to others.
Q: Does vitamin D help protect against COVID-19?
A: Some scientists have hypothesized vitamin D might be helpful, but there is no direct evidence that vitamin D can prevent COVID-19 or lessen disease severity. Nevertheless, it should be part of a healthy lifestyle.