In February, identical bills were introduced in the House and Senate to add seasonal flu vaccines to the IRS code as taxable. The legislation would exact a 75¢ per dose tax on any "vaccine against seasonal influenza." Given that the Centers for Disease Control projects that 135 million doses of flu vaccine will be used this year, the government's take on flu vaccines alone is over $100,000,000 per year.
Along with taxes on other vaccines, this tax would fund the Vaccine Injury Compensation Trust Fund. The fund is a "no-fault alternative to the traditional tort system for resolving vaccine injury claims that provides compensation to people found to be injured by certain vaccines." However, the fund is by no means in the same kind of trouble that other government "trust funds" are.