Study: NCT04478370

Intervention type: BIOLOGICAL
Group type: EXPERIMENTAL
Intervention: Mosquito bites
Description: Participants will be exposed to mosquito bites.~For the low-dose challenge, five 5 to 7-day-old nulliparous female imagoes (i.e. that have never blood fed before) will be introduced individual into 50 mL plastic tube covered with netting material.~For high-dose challenge, 47 mosquitoes will be split into four plastic cups of 10 cm in diameter covered with netting material (three cups with 12 mosquitoes and one cup with 11 mosquitoes), and 3 mosquitoes will be introduced individually into 50 mL plastic tubes.~Mosquito bites administered on participant's arm will be used to assess immediate and delayed skin reactions. Immediate and delayed skin reactions will be recorded respectively 20-30 min and 24-36 hours after the day 14 and day 21 challenges, requiring additional visits at day 15 and 22.

Intervention type: BIOLOGICAL
Group type: EXPERIMENTAL
Intervention: Mosquito bites
Description: Participants will be exposed to mosquito bites.~For the low-dose challenge, five 5 to 7-day-old nulliparous female imagoes (i.e. that have never blood fed before) will be introduced individual into 50 mL plastic tube covered with netting material.~For high-dose challenge, 47 mosquitoes will be split into four plastic cups of 10 cm in diameter covered with netting material (three cups with 12 mosquitoes and one cup with 11 mosquitoes), and 3 mosquitoes will be introduced individually into 50 mL plastic tubes.~Mosquito bites administered on participant's arm will be used to assess immediate and delayed skin reactions. Immediate and delayed skin reactions will be recorded respectively 20-30 min and 24-36 hours after the day 14 and day 21 challenges, requiring additional visits at day 15 and 22.

Intervention type: BIOLOGICAL
Group type: EXPERIMENTAL
Intervention: Mosquito bites
Description: Participants will be exposed to mosquito bites.~For the low-dose challenge, five 5 to 7-day-old nulliparous female imagoes (i.e. that have never blood fed before) will be introduced individual into 50 mL plastic tube covered with netting material.~For high-dose challenge, 47 mosquitoes will be split into four plastic cups of 10 cm in diameter covered with netting material (three cups with 12 mosquitoes and one cup with 11 mosquitoes), and 3 mosquitoes will be introduced individually into 50 mL plastic tubes.~Mosquito bites administered on participant's arm will be used to assess immediate and delayed skin reactions. Immediate and delayed skin reactions will be recorded respectively 20-30 min and 24-36 hours after the day 14 and day 21 challenges, requiring additional visits at day 15 and 22.

Intervention type: BIOLOGICAL
Group type: EXPERIMENTAL
Intervention: Mosquito bites
Description: Participants will be exposed to mosquito bites.~For the low-dose challenge, five 5 to 7-day-old nulliparous female imagoes (i.e. that have never blood fed before) will be introduced individual into 50 mL plastic tube covered with netting material.~For high-dose challenge, 47 mosquitoes will be split into four plastic cups of 10 cm in diameter covered with netting material (three cups with 12 mosquitoes and one cup with 11 mosquitoes), and 3 mosquitoes will be introduced individually into 50 mL plastic tubes.~Mosquito bites administered on participant's arm will be used to assess immediate and delayed skin reactions. Immediate and delayed skin reactions will be recorded respectively 20-30 min and 24-36 hours after the day 14 and day 21 challenges, requiring additional visits at day 15 and 22.

Intervention type: BIOLOGICAL
Group type: EXPERIMENTAL
Intervention: Mosquito bites
Description: Participants will be exposed to mosquito bites.~For the low-dose challenge, five 5 to 7-day-old nulliparous female imagoes (i.e. that have never blood fed before) will be introduced individual into 50 mL plastic tube covered with netting material.~For high-dose challenge, 47 mosquitoes will be split into four plastic cups of 10 cm in diameter covered with netting material (three cups with 12 mosquitoes and one cup with 11 mosquitoes), and 3 mosquitoes will be introduced individually into 50 mL plastic tubes.~Mosquito bites administered on participant's arm will be used to assess immediate and delayed skin reactions. Immediate and delayed skin reactions will be recorded respectively 20-30 min and 24-36 hours after the day 14 and day 21 challenges, requiring additional visits at day 15 and 22.