Do I deserve to get fired?

I work for a commercial cleaning company and for the past 3 days I've called in sick. I have a sore throat. They don't know I have a sore throat. They just know I'm sick. I thought I'd be able to go back to work today but my throat is still sore so I told them I will probably come back next week. The thing is im pretty sure they don't have anyone to cover for me so I'm making it very difficult. But isn't that kind of their fault? I've been working for them 6 months and they couldn't find anyone that could cover for me? Anyways, for I deserve to be fired for calling out sick?

Do I deserve to get fired?
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