.after the established diagnosis of acute glomerulonephritis and low levels of C3 and C4 and appropriate treatment in a child 7 years old by the time it takes to be normal levels of C3 and C
Hi, C3, C4 are complement factors which help to diagnose the #AGN. Don't worry about the levels anymore. Low levels won't cause a problem. Levels are low due to the formation of immune complexes deposited in the kidney.  Hope I have answered your query. Let me know if I can assist you further.