Can step throat or allergies cause an ALC of 4.1? Are the only options cold/flu or cll?! Had no sympt. Other than swollen lymphs that have gone down

ALC? did you mean Absolute Lymphocytic Count or Absolute Leucocytic count, either can be caused by viral infection, all are temporary, if lymph glands shrank in size that's a good sign, anyway keep the follow up with your doctor, who might order another blood count after few weeks to see that numbers normalized in correlation with your general condition, take care.