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Medications that are definitely not safe to take when breastfeeding include radioactive drugs, antimetabolites, some cancer (chemotherapy) agents, bromocriptine, ergotamine, methotrexate, and cyclosporine.
A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
There used to be a metric calendar, as well as metric clocks. The metric calendar, or "French Republican Calendar" divided the year into 12 months, but each month was divided into three 10-day weeks. Each day had 10 decimal hours. Each hour had 100 decimal minutes. Due to lack of popularity, the metric clocks and calendars were ended in 1795, three years after they had been first marketed.
Human kidneys will clean about 1 million gallons of blood in an average lifetime.