| SCARLATINA | Infectious childhood disease causing fever and a bright red rash (10) |
| MEASLES | An infectious viral disease causing fever and a red rash, usually occurring in childhood (7) |
| SCARLETFEVER | Illness characterised by high temperature and a bright red rash (7,5) |
| CHICKENPOX | Infectious disease causing fever and inflamed pimples (10) |
| MUMPS | Infectious childhood disease (5) |
| TOOTHBRUSH | Something for the nippers in addition: book probing childhood disease |
| GOLDCREST | A small bird with a greenish plumage and a bright, yellow-and-black crown (9) |
| YELLOWFEVER | Tropical virus causing fever and jaundice (6,5) |
| GERMANMEASLES | Infectious disease with a red rash (6, 7) |
| ZEUGMA | Figure of speech exemplified by "She ran a fever and a marathon" |
| SPEEDWELL | A Peak District cavern and a bright blue wildflower (9) |
| WRASSE | Marine fish of tropical and temperate seas with thick lips and a bright coloration (6) |
| BULLFINCH | Small European bird, the male of which has a bright red throat and breast and a black crown (9) |
| GOLDFINCH | A small bird with a bright red face and yellow wing patch (9) |
| RUBELLA | A Skimmia japonica with red buds: 'Red Rash'? (7) |
| STIRCRAZY | Having cabin fever ... and a hint to this puzzle's circles |
| AGARIC | The Fly ..., Amanita muscaria, is a poisonous mushroom with a bright red or orange cap and white spots (6) |
| SPRITE | A transient luminous event in the form of a bright red flash occurring above the cumulonimbus cloud of a thunderstorm; or, an elf-, fairy- or pixie-like being (6) |
| CINNABAR | Clubs and pubs adopting a bright red colour (8) |
| FLYAGARIC | Poisonous mushroom with a bright red or orange cap and white spots (3,6) |
