"I think it is important we are realistic and I don't think anyone can predict when this disease will disappear", he said.
"Chile, like most countries in the global community, considers that only through worldwide cooperation is it possible to emerge victorious from the crisis caused by COVID-19", said Ambassador Cristian Streeter, Director of Multilateral Policy, Ministry of Foreign Affairs, speaking on behalf of President Piñera of Chile.
"The trajectory of this outbreak is in our hands".
There are now more than 100 potential vaccines in development, but Dr Ryan noted there are other illnesses such as measles that still haven't been eliminated despite there being vaccines for them. "Solidarity within and between countries and the private sector is essential if we are to overcome these hard times", he said.
Some commentators have speculated that African countries may be reporting fewer cases because they are not detecting them, but Karamagi points to South Africa, which has "good detection capabilities, but low numbers".
"We are going to have to remain on alert, stay the course and ensure that we are ready to respond", Dr Ryan emphasised.
Despite the risk that loosening restrictions could lead to infection spikes, European nations have been seeking to restart cross-border travel, particularly as the summer holiday season looms for countries whose economies rely on tourists.
A report by the UN Economic Commission for Africa in mid-April predicted a much higher infection and death rate on the continent, of 1.2 billion infections and 3.3 million deaths.
In the letter, the Costa Rican deputies demanded an outside evaluation of the situation in Nicaragua, since that information would allow the organizations of civil society and governments of the region to take the measure within their reach to mitigate the effects of the pandemic. "Most countries implemented these measures nearly as soon as the first case was detected", Michel Yao, based in the Congolese capital of Brazzaville for the World Health Organization, told AFP. Two other days this week also saw fewer than 10,000 new cases.