Hello, Thanks for your query. what usually happens is that one looks at hemoglobin and starts the treatment with iron, often over the counter. there are many factors that may cause anemia there may be other factors like vitamin b 12 and folate levels that may also cause anemia. it may be signs of vitamin deficiency that you may be developing So i would suggest you try those as well.. as for iron, you may discontinue it if you are not well during this episode of potential to be viral illness. this iron therapy can later be restarted I do hope that you have found something helpful and I will be glad to answer any further query. Take care