Before we examine the statistics on cross‐infection in dental settings, it must be acknowledged that lack of reporting poses a huge barrier to obtaining accurate data. An excellent review by Volgenant et al. examines the several potential routes of transmitting infections in the dental office. These include blood‐borne, contact, and aerosol transmission. Several instances of transmission of blood‐borne pathogens to patients and health‐care personnel have been documented. These are attributable both to poor infection control practices, as well as to blood exposure accidents. However, the risk appears to be very low, with only five cases reported between 2003 and 2016. Aerosol‐transmitted diseases have been documented, although dental unit water lines appear to be the microbial source. Especially, legionellosis has been connected to dental treatment in two case reports. Moreover, dentists in certain areas have been shown to have higher antibody levels to Legionella when compared to non‐dental professionals, adding further credence to dental unit water lines as the source of aerosol microorganisms.