The emphasis on keeping disease out is rooted in Tongan history. Years ago, Westerners brought diseases like smallpox, the plague and measles into the country
"aid for Tonga"
First aid flights arrive in Tonga after massive volcanic eruption and tsunami
Safe drinking water is one of the most immediate needs. The volcanic ash and seawater have contaminated the island chain’s potable supply and the government there has advised people to drink only bottled water.