Meghan Marklehas caught a case of the giggles!

During hervisit to TongawithPrince Harry, the pregnant Duchess of Sussex continued to takeprecaution against mosquitos. The Zika virus, which causes birth defects including microcephaly, has been detected in Fiji and Tonga, two stops on their royal tour — but she didn’t skip their visit to Tupou College, where the couple dedicated two forest reserves at the school’s on-site forest, the Toloa Forest Reserve.

Karwai Tang/WireImage

775242896KT018_The_Duke_And

Tim Rooke/REX/Shutterstock

9944967b

Chris Jackson/Getty

775225763RW047_The_Duke_And

Samir Hussein / WireImage

The Duke And Duchess Of Sussex Visit Fiji - Day 1

775242892PS00005_The_Duke_A

As Meghanstepped out on Wednesday eveningto attend a welcome reception and dinner in with King Tupou VI and Queen Nanasipau’u in Tonga, it was impossible not to notice hersuper shiny arms.

She opted for a cap-sleeve dress for the engagement, but still protected her arms against mosquitos with insect repellent.

“The advice would be to wear a repellent which contains an active ingredient and wear that repellent all day and all evening,” Professor James G. Logan, Head of the Department of Disease Control at the London School of Hygiene and Tropical Medicine, tells PEOPLE.

Prince Harry and Meghan Duchess of Sussex tour of Tonga - 25 Oct 2018

“You have to put the repellent on like a hand cream. You have to really rub it in,” Logan adds. “If you squirt it on like a perfume, that won’t do anything because the mosquito will find a bit that’s not covered. A spray or a lotion is fine but really rub it in and reapply it often. There are four active ingredients, one of the main ones is DEET and it’s safe to use that during pregnancy.”

source: people.com