$\begin{array}{1 1} \text{a. Difficulty in respiration, fever, chills,coughs and headaches} \\\text{b. Constipation, abdominal pain, cramps, blood clot}\\\text{c.Nasal congestion and discharge, cough, sore throat, headache} \\\text{d.High fever, weakness, stomach pain, loss of appetite and constipation} \end{array}$
