A person with O-negative blood group is a universal donor as O-negative blood can be transfused to any blood group. Blood group is determined by the presence of antigen(s) on the membrane of red blood cells.
Certified nursing assistant salary in the USA. The average salary for a certified nursing assistant in the US, according to PayScale, is $17,735 to $31,314 per year. Their hourly rate is $8.47 to $14.32 per hour.ccording to the BLS, certified nursing assistant earns around $10 to $12 per hour, or around $20,000 to $24,000 per year. The top paid certified nursing assistant receives salary of $30,000 per year, or $24.99 per hour.
In its May 2011 figures, the Bureau of Labor Statistics reports an average hourly wage of $12.22 for nursing assistants and related staff, or $25,420 per year. There is a considerable variance between the highest and lowest earners, with 10 percent of nursing assistants earning $8.68 per hour or less, and 10 percent earning $16.91 per hour or more. Assuming a 40-hour work week, this represents earnings of $18,060 per year at the low end of the scale and $35,170 at the high end.