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A summer cold or flu feels pretty similar to what you’d experience during the fall or winter. Here’s a refresher on how to differentiate them from one another.
The U.S. is seeing an uptick in adenovirus infections, according to CDC data. After retreating during the pandemic, summer colds are back in some regions.
Nearly everyone is catching the rhinovirus — the most frequent cause of the common cold — this winter season, but for many people it’s not just a case of the sniffles.
Cold temperatures lead to drier air, which may dehydrate mucous membranes, preventing the body from effectively defending against respiratory virus infections. [ 3 ] [ 4 ] [ 5 ] Viruses are preserved in colder temperatures due to slower decomposition, so they linger longer on exposed surfaces (doorknobs, countertops, etc. ).
The common cold or the cold is a viral infectious disease of the upper respiratory tract that primarily affects the respiratory mucosa of the nose, throat, sinuses, and larynx. [ 6 ] [ 8 ] Signs and symptoms may appear in as little as two days after exposure to the virus. [ 6 ]
Night blindness and its worsened condition, xerophthalmia, are markers of Vitamin A deficiency; collections of keratin in the conjunctiva, known as Bitot's spots, and ulceration and necrosis of cornea keratomalacia can be seen. Conjunctival epithelial defects occur around lateral aspect of the limbus in the subclinical stage of VAD.
Scientists say the finding offers the first biological evidence for why respiratory illnesses are more common in colder months.
Cold sensitivity or cold intolerance is unusual discomfort felt by some people when in a cool environment. [ 1 ] Cold sensitivity may be a symptom of hypothyroidism , anemia , low body weight, iron deficiency , vitamin B 12 deficiency , fevers , fibromyalgia or vasoconstriction . [ 2 ]