Fifth Disease (Erythema Infectiosum): Symptoms, Causes
Fifth disease (erythema infectiosum) is a childhood condition that appears as a bright red rash on your child's cheeks. It's nicknamed "slapped cheek disease" because of this rash. A virus called parvovirus B19 causes fifth disease. This virus is common and very contagious. Infected people can spread it through coughing or sneezing.
Steel Hardness Conversion Table
Steel Hardness conversion calculator. Enter a figure into any of the fields and click calculate, the nearest values in each scale is shown, or zero if out of range. Values are approximate and for guidance only. Reference Table: Steel hardness conversion chart - all values approximate. Since the various types of hardness tests do not all measure ...