The share prices of blue-chip biopharmaceutical companies continued on their lackluster trajectory, which started in June and collectively lost ground last month, with the BioWorld Biopharmaceutical index slipping about 1.3% as investors took a break in order to digest the deluge of COVID-19 vaccine data released during the period and the impact on the bottom lines that the pandemic has exerted among those companies that have reported their second-quarter results.