Due to planned demolition work close to Auckland City Hospital’s cancer ward, some immune-compromised patients undergoing cancer treatment are being moved. This is to lessen the risk of exposure to potentially toxic fungal spores. Aspergillus, a common mould with spores that can be inhaled, is breathed in by most people every day with no ill effects. However, people with weakened immune systems – such as those with cancer – are at a higher risk of developing health problems, such as infection, from the spores.