@Wetrix Depending on what you define as "Russia".

Pfizer is an US company so you could just as well say "how can you trust Trump's US about a vaccine".

The difference of course is that even Trump never really resorted to micro-management of private US companies for political gain while Putin is doing that routinely.

The latter of course lead to total lack of trust in Russian companies as reliable partners, ready to fulfill their business commitments.