EN 14683 is the European standard for medical face masks intended to prevent infection from spreading from patients to staff in medical settings. 

Type I and Type II (R)

Medical face masks specified in EN 14683 are classified into two types, Type I and Type II, according to their bacterial filtration efficiency. Type II is then further divided into whether the mask is splash resistant, specified with an 'R'. 

Type I masks are used for patients to reduce the risk of infections, for example in pandemic or epidemic situations. Type I masks are not suitable for healthcare professionals in an operating room or in other medical settings.