Related by context. Frequent words. (Click for all words.) 76 fatigue shortness 75 cough shortness 67 Shortness 64 nausea headache 64 fatigue dizziness 63 sore throat cough 63 coughing wheezing 63 abdominal pain diarrhea 63 fever muscle aches 63 dehydration abdominal pain 63 runny nose sore throat 62 diarrhea nausea vomiting 62 dizziness fatigue 62 diarrhea constipation 62 constipation diarrhea 61 diarrhea abdominal pain 61 runny nose sneezing 61 chills fever 61 headache nausea 61 chest tightness 61 post nasal drip 61 vomiting nausea 61 cough runny nose 61 Nitrogen oxides 61 fatigue nausea 61 nausea diarrhea 60 muscle twitching 60 shortness 60 sneezing runny nose 60 asthma bronchitis 60 nausea vomiting 60 throat irritation 60 headache dizziness 59 fever chills 59 fever chills headache 59 respiratory irritant 58 dizziness headache 58 cough sore throat 58 obstructive lung 58 fever lethargy 58 aggravate asthma 58 dizziness nausea 58 vomiting diarrhea 58 wheezing coughing 57 nausea headaches 57 body aches headache 57 painful urination 57 nausea dizziness 57 Particulates 57 nausea vomiting diarrhea 57 body aches coughing 56 diarrhea fever 56 profuse sweating 56 fever runny nose 56 pneumonia bronchitis 56 asthma emphysema 56 lung irritation 56 nausea fatigue 56 bloody stools 56 animal dander 56 edema swelling 56 bone marrow suppression 55 red watery eyes 55 scratchy throats 55 fever nausea vomiting 55 diarrhea vomiting 55 fever vomiting 55 muscle ache 55 Hydrogen sulfide 55 depression irritability 55 anxiety irritability 55 fatigue irritability 55 myalgia 54 Symptoms 54 Drowsiness 54 Allergic rhinitis 54 diarrhea nausea 54 encephalitis inflammation 54 rapid heartbeats 54 gastric reflux 54 fever nausea 54 extreme tiredness 54 headaches dizziness 54 sore throat respiratory 54 Allergic reactions 54 asthenia 54 paresthesia 54 photophobia 54 facial flushing 54 nasopharyngitis 53 include fever headache 53 stomach cramping 53 Inhaled 53 fever diarrhea nausea 53 muscle rigidity 53 Hyperthyroidism 53 airborne allergens 53 light headedness 53 fever headache 53 fever aches 53 Diesel exhaust