<prompt> The following are true about measlesIt is an RNA virusCauses Kopliks spots on the conjunctivaAcute catarrhal conjunctivitis is a known featuresAll the above  <response>: Measles is caused by Morbilivirus which comes under paramyxoviridae familyenveloped ,helical,RNA virus.First signs of clinical disease include prodromal malise,fever,conjunctival injection ,cough nasal discharge .A day or two before the rash begins,Kopliks spots develop on the buccal mucosa occasionally on the conjunctiva intestinal mucosa. Reference : Harrison20th edition pg 879 