I’m sorry to hear that your daughter has been unwell. Yes, stress can depress the function of the immune system leading to a variety of infections such as that giving rise to glandular fever.
To improve immune function and fight the viral infection, I would suggest that she uses Echinacea and as sore throat appears to be the major symptom, suggests that she uses Echinacea in the form of a throat spray.
There are a variety of herbs which can help with stress. The best or ‘strongest’ are combinations based around valerian but for milder stress, we would recommend using the herb Avena sativa.
I hope that this information is helpful to both you and your daughter and I wish her a speedy recovery.
Do you have questions? Please feel free to ask.
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