The story “Vaccinate or go to jail” (23 February, p 17) should have read “Washington DC’s Department of Health”, not the “US Department of Health”. The measures referred to have only been taken by the city, not the entire country.
Also, our article on antimatter (23 February, p 11) stated that antihydrogen atoms were first detected at Fermilab in 1996, when in fact similar observations were made at CERN in 1995. Antimatter particles have been trapped before. The team was instead reporting on the possible creation of antimatter atoms.
Finally, the Great Britain team won one more medal at the Winter Olympics than the two predicted by Harvard economists, returning with a gold and two bronze, not one less as reported last week (2 March, p 5).
