COVID taskforce spokesman Catry warned earlier this week that action must be taken if this "snowball effect" was not to turn into an "avalanche" of new cases.
Philippe's letter was sent amid growing demands that Belgium reassess its colonial past and take responsibility for the atrocities.
Hazard has not been able to make a massive impact during his debut season in La Ligas as it was badly disrupted by injuries.
Vast swathes of the sporting community have already contributed generously to fight the pandemic, with donations pouring in from teams and individuals alike.
Belgium has entered what authorities hope will be the nation's peak period of the pandemic, and around half the intensive care beds in hospital units across the country are occupied, Andre said.
Belgium will be one of the favourites as they look to lift a first major international title when the Euros get underway on June 12.
Netherlands coach Max Caldas said it is time to move on after losing the game and concentrate on the future matches.
Olympic silver medallist Belgium created history by eking out a 3-2 win in the penalty shoot-out after the final match of the game's showpiece event ended in a goalless draw.
The 'golden generation' of Belgium players like Eden Hazard, Kevin De Bruyne and Romelu Lukaku, were produced by a system of teaching ball skills and vision from a young age.
Belgium are ranked third in the world, behind only Germany and Brazil, but coach Roberto Martinez said there was no room for complacency against Tunisian, ranked 21.
Dedryck Boyata starts in defence as Eden Hazard leads Belgium against Panama in FIFA World Cup Group G opener
Roman Torres, whose goal against Costa Rica in qualifying secured Panama a place in Russia, captains the side from central defence.
The sixth man was arrested on a warrant issued on Wednesday, a week after the five others, the federal prosecutor's office said.
Belgium's Group G rivals from the World Cup will have been warned, with unpleasant viewing for England, Panama and Tunisia.
The 23-year-old Divock Origi was the breakout star of Belgium's World Cup campaign in Brazil four years ago.
Belgium, third in the FIFA rankings, go into the World Cup as Group G favourites, facing Tunisia, England and Panama.