I cannot recommend this product and/or service. I think it was just a bad cold (not enough aches and fever for flu), but the coughing and coughing and coughing and coughing was kind of unbelievable. Thankfully, that seems to have died down, finally. Also thankfully, it more or less happened over a weekend, so I only missed work today and last Thursday.
Anyway, The Plague is highly overrated. Avoid it if at all possible.