BEIJING/LONDON (Reuters) -General Electric’s healthcare unit said on Tuesday it had increased output of dye used for medical scans and tests at its factory in Ireland and shipped products by air to help combat shortages caused by the suspension of its Shanghai factory. The steps to boost and speed deliveries of chemicals used in CT scans, x-rays and radiography highlight the far-reaching impact the city’s prolonged COVID-19 lockdown is having on global manufacturing and supply of critical goods. Some of the largest U.S. hospitals said on Tuesday they are facing critical shortages of iodinated …