Viral Upper Respiratory Tract Infection (URTI): This is the most common cause of a dry, sore throat accompanied by runny nose and sneezing. The symptoms presented are typical of a viral infection such as the common cold, which is often caused by rhinoviruses.

Allergic Rhinitis: This condition can cause similar symptoms, including a sore throat due to postnasal drip, runny nose, and sneezing. It's a common condition, especially in individuals with a history of allergies.
Influenza: Although more systemic symptoms like fever and body aches are typical, influenza can present with upper respiratory symptoms including a sore throat, runny nose, and sneezing, especially in the early stages.
Sinusitis: This can be a complication of a viral URTI or an allergic reaction, leading to inflammation of the sinuses, which may cause a sore throat, runny nose, and sneezing.

Epiglottitis: Although rare, epiglottitis is a potentially life-threatening condition that requires immediate medical attention. It can present with a severe sore throat and difficulty swallowing, but early on, it might be mistaken for a common URTI.
Strep Throat (Streptococcal Pharyngitis): This bacterial infection can cause a severe sore throat and should be considered, especially if symptoms like fever, swollen lymph nodes, and absence of cough are present. It requires antibiotic treatment to prevent complications.
Mononucleosis (Infectious Mononucleosis): Caused by the Epstein-Barr virus, this condition can present with a sore throat, fever, and lymphadenopathy. It's more common in adolescents and young adults.

Lemierre's Syndrome: A rare but serious condition that starts with a sore throat, which can then lead to a bacterial infection of the jugular vein. It's characterized by fever, neck pain, and swelling.
Diphtheria: Although very rare in areas with good vaccination coverage, diphtheria can cause a severe sore throat and should be considered in unvaccinated individuals or those traveling from areas where the disease is more common.
Tuberculosis (TB): TB can cause a chronic sore throat among other symptoms, and although rare, it's an important consideration, especially in individuals with risk factors such as immunocompromised states or recent travel to endemic areas.