** Shares in Polish drug developer Mabion MABP.WA surge
24%, extending Wednesday's gains of about 90% urn:newsml:reuters.com:*:nL5N2L124O
** The stock's rally follows announcement of signing a
framework deal with U.S. vaccine developer Novavax NVAX.O
under its COVID-19 vaccine programme urn:newsml:reuters.com:*:nL2N2L10PM
** On Thursday before the bell, Mabion announced start of an
accelerated book building process for a private placement of up
to 2.4 million new shares urn:newsml:reuters.com:*:nFWN2L20BU
** Including today's rise, Mabion stock has gained 250% YTD
and is the best performer on Warsaw mWIG40 .MWIG40 index
((Adrianna.Ebert@thomsonreuters.com))